CVE-2021-31884

highpriority · track · 40stack campaign · NUCLEUS:13EPSS 0.015 · 74 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.50% (74th) EPSS
CVSS 7.5 · high
Is it mine?
166 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-26

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Capital VSTAR (All versions with enabled Ethernet options), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). The DHCP client application assumes that the data supplied with the “Hostname” DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to Out-of-bound reads, writes, and Denial-of-service conditions. (FSMD-2021-0014)

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedNucleus ReadyStart V3siemens_psirt

    Update to V2017.02.4 or later version

    https://support.sw.siemens.com/en-US/product/1009925838/
  • FixedNucleus Source Codesiemens_psirt

    Contact customer support to receive patch and update information

  • FixedAPOGEE PXC Compact (BACnet)siemens_psirt

    Update to V3.5.4 or later version

  • FixedAPOGEE PXC Compact (P2 Ethernet)siemens_psirt

    Update to V2.8.19 or later version

  • FixedAPOGEE PXC Modular (BACnet)siemens_psirt

    Update to V3.5.4 or later version

  • FixedAPOGEE PXC Modular (P2 Ethernet)siemens_psirt

    Update to V2.8.19 or later version

  • FixedDesigo PXC00-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC00-Usiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC001-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC100-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC12-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC128-Usiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC200-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC22-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC22.1-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC36.1-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC50-E.Dsiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC64-Usiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXM20-Esiemens_psirt

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedTALON TC Compact (BACnet)siemens_psirt

    Update to V3.5.4 or later version

  • FixedTALON TC Modular (BACnet)siemens_psirt

    Update to V3.5.4 or later version

  • Fixedwago_psirt

    For fieldbus coupler: - 750-332 - 750-362/xxx-xxx - 750-363/xxx-xxx - 750-364/xxx-xxx - 750-365/xxx-xxx For PLCs: - 750-823 - 750-832/xxx-xxx - 750-862 - 750-890/xxx-xxx - 750-891 - 750-893 We recommend all effected users to update to the firmware version listed below: | Article Number | Fixed in Firmware Version | Availability | |----------------------|----------------------------|---------------------------| | 750-823 | >=FW10 | January 2022 | | 750-832/000-00x | >=FW10 | After BACnet certification| | 750-862 | >=FW10 | January 2022 | | 750-890/xxx-xxx | >=FW10 | January 2022 | | 750-891 | >=FW10 | January 2022 | | 750-893 | >=FW10 | January 2022 | | 750-332 | >=FW10 | After BACnet certification| | 750-362/xxx-xxx | >=FW10 | January 2022 | | 750-363/xxx-xxx | >=FW10 | January 2022 | | 750-364/xxx-xxx | >=FW10 | January 2022 | | 750-365/xxx-xxx | >=FW10 | January 2022 |

  • FixedNucleus ReadyStart V3cisa_csaf_ot

    Update to V2017.02.4 or later version

    https://support.sw.siemens.com/en-US/product/1009925838/
  • FixedNucleus Source Codecisa_csaf_ot

    Contact customer support to receive patch and update information

  • FixedAPOGEE PXC Compact (BACnet)cisa_csaf_ot

    Update to V3.5.4 or later version

  • FixedAPOGEE PXC Compact (P2 Ethernet)cisa_csaf_ot

    Update to V2.8.19 or later version

  • FixedAPOGEE PXC Modular (BACnet)cisa_csaf_ot

    Update to V3.5.4 or later version

  • FixedAPOGEE PXC Modular (P2 Ethernet)cisa_csaf_ot

    Update to V2.8.19 or later version

  • FixedDesigo PXC00-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC00-Ucisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC001-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC100-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC12-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC128-Ucisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC200-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC22-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC22.1-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC36.1-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC50-E.Dcisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXC64-Ucisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedDesigo PXM20-Ecisa_csaf_ot

    Update to V6.30.016 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109810577
  • FixedTALON TC Compact (BACnet)cisa_csaf_ot

    Update to V3.5.4 or later version

  • FixedTALON TC Modular (BACnet)cisa_csaf_ot

    Update to V3.5.4 or later version

  • MitigationNucleus NETsiemens_psirt

    Contact customer support or your local Nucleus Sales team for mitigation advice

  • MitigationAPOGEE MBC (PPC) (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MBC (PPC) (P2 Ethernet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MEC (PPC) (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MEC (PPC) (P2 Ethernet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Compact (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Compact (P2 Ethernet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Modular (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Modular (P2 Ethernet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC00-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC00-Usiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC001-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC100-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC12-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC128-Usiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC200-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC22-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC22.1-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC36.1-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC50-E.Dsiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC64-Usiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXM20-Esiemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationTALON TC Compact (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationTALON TC Modular (BACnet)siemens_psirt

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • Mitigationwago_psirt

    1. Use general security best practices to protect systems from local and network attacks. 2. Do not allow direct access to the device from untrusted networks. 3. Update to the latest firmware according to the table in chapter solutions. 4. Disable the DHCP, DNS and the FTP port 21. 5. Industrial control systems (ICS) should not be directly accessible from the Internet, but should be protected by consistently applying the defense-in-depth strategy. The BSI provides general information on securing ICS in the ICS Compendium [BSI2013] and on the official BSI website [BSI2021]. For fieldbus coupler: - 750-331 - 750-352/xxx-xxx For PLCs: - 750-829 - 750-831/xxx-xxx - 750-852 - 750-880/xxx-xxx - 750-881 - 750-889 The listed fieldbus coupler and PLCs above are based on Nucleus V1 RTOS. At the moment there are no updates for this version available. Due to this reason WAGO recommends according to the recommendations of the BSI to implement the following measures: 1. Enforce segmentation controls and proper network hygiene to reduce the risk of vulnerable devices. Restrict external communication paths and isolate vulnerable devices in zones as a mitigating measure. 2. Ensure DHCP responses from non-authorized servers are blocked or discarded. 3. Monitor network traffic for anomalies and discard invalid packets. 4. Disable or block FTP, DHCP, DNS especially on critical network segments 5. Please check regularly https://certvde.com/de/ for an update of this Advisory.

  • Mitigationphoenix_contact_psirt

    Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection

  • MitigationNucleus NETcisa_csaf_ot

    Contact customer support or your local Nucleus Sales team for mitigation advice

  • MitigationAPOGEE MBC (PPC) (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MBC (PPC) (P2 Ethernet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MEC (PPC) (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE MEC (PPC) (P2 Ethernet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Compact (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Compact (P2 Ethernet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Modular (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationAPOGEE PXC Modular (P2 Ethernet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC00-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC00-Ucisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC001-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC100-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC12-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC128-Ucisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC200-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC22-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC22.1-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC36.1-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC50-E.Dcisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXC64-Ucisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationDesigo PXM20-Ecisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationTALON TC Compact (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • MitigationTALON TC Modular (BACnet)cisa_csaf_ot

    CVE-2021-31881, CVE-2021-31882, CVE-2021-31883, CVE-2021-31884: Disable the DHCP client and use static IP address configuration instead (Note that the DHCP client is disabled by default on APOGEE/TALON and Desigo products.)

  • No fix plannedNucleus NETsiemens_psirt

    Currently no remediation is planned

  • No fix plannedAPOGEE MBC (PPC) (BACnet)siemens_psirt

    Currently no fix is planned

  • No fix plannedAPOGEE MBC (PPC) (P2 Ethernet)siemens_psirt

    Currently no fix is planned

  • No fix plannedAPOGEE MEC (PPC) (BACnet)siemens_psirt

    Currently no fix is planned

  • No fix plannedAPOGEE MEC (PPC) (P2 Ethernet)siemens_psirt

    Currently no fix is planned

  • No fix plannedNucleus NETcisa_csaf_ot

    Currently no remediation is planned

  • No fix plannedAPOGEE MBC (PPC) (BACnet)cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedAPOGEE MBC (PPC) (P2 Ethernet)cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedAPOGEE MEC (PPC) (BACnet)cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedAPOGEE MEC (PPC) (P2 Ethernet)cisa_csaf_ot

    Currently no fix is planned

02

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9
v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Phoenix Contact PSIRT DE
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT DE
v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-170USCWE-170USCWE-170USCWE-170USCWE-170USCWE-170USCWE-787US
04

affected products (166)

Products and version ranges known to be affected.

showing 20 of 166
05

advisories (6)

Vendor and ecosystem advisories describing this.

  • SSA-044112SSA-044112: Multiple Vulnerabilities (NUCLEUS:13) in the TCP/IP Stack of Nucleus RTOS2021-11-09csaf · siemens_psirtDE

    The TCP/IP stack and related services (FTP, TFTP) of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) contain several vulnerabilities, also known as "NUCLEUS:13" and as documented below. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends countermeasures for products where updates are not available.

  • SSA-114589SSA-114589: Multiple Vulnerabilities in Nucleus RTOS based APOGEE, TALON and Desigo PXC/PXM Products2021-11-09csaf · siemens_psirtDE

    Multiple vulnerabilities (also known as "NUCLEUS:13") have been identified in the Nucleus RTOS (real-time operating system) and reported in the Siemens Security Advisory SSA-044112: https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf. The products listed below use affected versions of the Nucleus software and inherently contain these vulnerabilities. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

  • VDE-2021-050WAGO: Multiple devices affected by Vulnerabilities in NUCLEUS TCP Stack.2021-11-16csaf · wago_psirtDE

    Multiple vulnerabilities were reported in the Nucleus Real-Time Operating System (RTOS). The Nucleus RTOS is an essential component in several WAGO PLCs and fieldbus coupler. WAGO uses older Versions of the Nucleus RTOS also in legacy products. For additional information please consult the official Siemens advisory: • Advisory SSA-044112

  • VDE-2021-059PHOENIX CONTACT: BLUEMARK X1 / LED / CLED printers utilizing the Siemens Nucleus RTOS TCP/IP Stack2022-01-11csaf · phoenix_contact_psirtDE

    The TCP/IP stack and of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) contain several vulnerabilities. Nucleus NET is utilized by BLUEMARK X1 / LED / CLED. The abovementioned BLUEMARK printers are discontinued and only impacted by a subset of 8 of the 13 discovered vulnerabilities.

  • ICSA-21-313-03Siemens Nucleus RTOS TCP/IP Stack2021-11-09icsa · cisa_csaf_otUS

    The TCP/IP stack and related services (FTP, TFTP) of the networking component (Nucleus NET) in Nucleus Real-Time Operating System (RTOS) contain several vulnerabilities, also known as "NUCLEUS:13" and as documented below. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends countermeasures for products where updates are not available.

  • ICSA-21-315-07Siemens Nucleus RTOS-based APOGEE and TALON Products (Update C)2021-11-09icsa · cisa_csaf_otUS

    Multiple vulnerabilities (also known as "NUCLEUS:13") have been identified in the Nucleus RTOS (real-time operating system) and reported in the Siemens Security Advisory SSA-044112: https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf. The products listed below use affected versions of the Nucleus software and inherently contain these vulnerabilities. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtwago_psirtphoenix_contact_psirtNVDCVE.orgMITRE
published 2021-11-09modified 2026-06-17
08

references (17)

External citations — patches, advisories, analysis.

scry

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