CVE-2021-27391

highPriorität · verfolgen · 40EPSS 0.034 · 89. PerzentilDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
3.37% (89th) EPSS
CVSS 10 · high
Is it mine?
48 products
Prüfe deine Angriffsfläche
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · bewertet 2026-10-26

A vulnerability has been identified in APOGEE MBC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE MEC (PPC) (P2 Ethernet) (All versions >= V2.6.3), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). The web server of affected devices lacks proper bounds checking when parsing the Host parameter in HTTP requests, which could lead to a buffer overflow. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the device with root privileges.

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

  • BehobenAPOGEE PXC Compact (BACnet)siemens_psirt

    Update to V3.5.3 or later version

  • BehobenAPOGEE PXC Modular (BACnet)siemens_psirt

    Update to V3.5.3 or later version

  • BehobenTALON TC Compact (BACnet)siemens_psirt

    Update to V3.5.3 or later version

  • BehobenTALON TC Modular (BACnet)siemens_psirt

    Update to V3.5.3 or later version

  • BehobenAPOGEE PXC Compact (BACnet)cisa_csaf_ot

    Update to V3.5.3 or later version

  • BehobenAPOGEE PXC Modular (BACnet)cisa_csaf_ot

    Update to V3.5.3 or later version

  • BehobenTALON TC Compact (BACnet)cisa_csaf_ot

    Update to V3.5.3 or later version

  • BehobenTALON TC Modular (BACnet)cisa_csaf_ot

    Update to V3.5.3 or later version

  • MitigationAPOGEE MBC (PPC) (P2 Ethernet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE MEC (PPC) (P2 Ethernet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE PXC Compact (BACnet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE PXC Compact (P2 Ethernet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE PXC Modular (BACnet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE PXC Modular (P2 Ethernet)siemens_psirt

    Disable the integrated web server

  • MitigationTALON TC Compact (BACnet)siemens_psirt

    Disable the integrated web server

  • MitigationTALON TC Modular (BACnet)siemens_psirt

    Disable the integrated web server

  • MitigationAPOGEE MBC (PPC) (P2 Ethernet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationAPOGEE MEC (PPC) (P2 Ethernet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationAPOGEE PXC Compact (BACnet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationAPOGEE PXC Compact (P2 Ethernet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationAPOGEE PXC Modular (BACnet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationAPOGEE PXC Modular (P2 Ethernet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationTALON TC Compact (BACnet)cisa_csaf_ot

    Disable the integrated web server

  • MitigationTALON TC Modular (BACnet)cisa_csaf_ot

    Disable the integrated web server

  • Kein Fix verfügbarAPOGEE MBC (PPC) (P2 Ethernet)siemens_psirt

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE MEC (PPC) (P2 Ethernet)siemens_psirt

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE PXC Compact (P2 Ethernet)siemens_psirt

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE PXC Modular (P2 Ethernet)siemens_psirt

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE MBC (PPC) (P2 Ethernet)cisa_csaf_ot

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE MEC (PPC) (P2 Ethernet)cisa_csaf_ot

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE PXC Compact (P2 Ethernet)cisa_csaf_ot

    Currently no remediation is available

  • Kein Fix verfügbarAPOGEE PXC Modular (P2 Ethernet)cisa_csaf_ot

    Currently no remediation is available

02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

10.0
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · high–critical · 9–10

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 10
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 5.9
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:T/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
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HsecondaryAusnutzbarkeit 3.9 · Auswirkung 5.9
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:T/RC:Csecondary · Siemens ProductCERT 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

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
04

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-119USCWE-120USCWE-120USCWE-120USCWE-120US
05

betroffene Produkte (48)

Betroffene Produkte und Versionsbereiche.

20 von 48 angezeigt
06

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

  • SSA-944498SSA-944498: Buffer Overflow Vulnerability in Web Server of APOGEE and TALON Automation Devices2021-09-14csaf · siemens_psirtDE

    A buffer overflow vulnerability in the integrated web server of multiple APOGEE and TALON automation devices could allow a remote attacker to execute arbitrary code on the devices with root privileges. Affected devices include the APOGEE MBC/MEC/PXC P2 Ethernet devices with Power Open Processors (PPC), APOGEE PXC BACnet devices, and TALON TC BACnet devices. 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, or not yet available.

  • ICSA-21-257-07Siemens APOGEE and TALON2021-09-14icsa · cisa_csaf_otUS

    A buffer overflow vulnerability in the integrated web server of multiple APOGEE and TALON automation devices could allow a remote attacker to execute arbitrary code on the devices with root privileges. Affected devices include the APOGEE MBC/MEC/PXC P2 Ethernet devices with Power Open Processors (PPC), APOGEE PXC BACnet devices, and TALON TC BACnet devices. 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, or not yet available.

07

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

08

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
veröffentlicht 2021-09-14geändert 2026-06-17
09

Referenzen (7)

Externe Belege — Patches, Meldungen, Analysen.

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