CVE-2023-28829

highpriority · track · 35EPSS 0.003 · 22 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.29% (22nd) EPSS
CVSS 8.8 · high
Is it mine?
42 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

A vulnerability has been identified in SIMATIC NET PC Software V14 (All versions), SIMATIC NET PC Software V15 (All versions), SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions), SIMATIC WinCC (All versions < V8.0), SINAUT Software ST7sc (All versions). Before SIMATIC WinCC V8, legacy OPC services (OPC DA (Data Access), OPC HDA (Historical Data Access), and OPC AE (Alarms & Events)) were used per default. These services were designed on top of the Windows ActiveX and DCOM mechanisms and do not implement state-of-the-art security mechanisms for authentication and encryption of contents.

01

remediations

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

A vendor fix is available.

  • FixedSIMATIC WinCCsiemens_psirt

    Update to V8.0 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109816599/
  • FixedSIMATIC WinCCcisa_csaf_ot

    Update to V8.0 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109816599/
  • MitigationSIMATIC NET PC Software V14siemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC NET PC Software V15siemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V8.2siemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V9.0siemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V9.1siemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC WinCCsiemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSINAUT Software ST7scsiemens_psirt

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC NET PC Software V14cisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC NET PC Software V15cisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V8.2cisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V9.0cisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC PCS 7 V9.1cisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSIMATIC WinCCcisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • MitigationSINAUT Software ST7sccisa_csaf_ot

    Disable the legacy OPC DA/HDA/AE services and switch to OPC UA, if possible

  • WorkaroundSIMATIC NET PC Software V14siemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC NET PC Software V15siemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V8.2siemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V9.0siemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V9.1siemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC WinCCsiemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSINAUT Software ST7scsiemens_psirt

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC NET PC Software V14cisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC NET PC Software V15cisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V8.2cisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V9.0cisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC PCS 7 V9.1cisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSIMATIC WinCCcisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • WorkaroundSINAUT Software ST7sccisa_csaf_ot

    SINATIC NET PC Software: Ensure that only trusted users are part of the SIMATIC Net group

  • No fix plannedSIMATIC NET PC Software V14siemens_psirt

    Currently no fix is planned

  • No fix plannedSIMATIC NET PC Software V15siemens_psirt

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V8.2siemens_psirt

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V9.0siemens_psirt

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V9.1siemens_psirt

    Currently no fix is planned

  • No fix plannedSINAUT Software ST7scsiemens_psirt

    Currently no fix is planned

  • No fix plannedSIMATIC NET PC Software V14cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIMATIC NET PC Software V15cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V8.2cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V9.0cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSIMATIC PCS 7 V9.1cisa_csaf_ot

    Currently no fix is planned

  • No fix plannedSINAUT Software ST7sccisa_csaf_ot

    Currently no fix is planned

02

cvss

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

8.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.9–8.8

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9
v3.13.9lowCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · CISA US
v3.13.9lowAV:A/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU
v3.13.9lowCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · ENISA EU
v3.13.9lowCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:Lsecondary · productcert@siemens.com DEexploitability 0.5 · impact 3.4
v3.13.9lowCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.18.1highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-477USCWE-477USCWE-477USCWE-477US
05

affected products (42)

Products and version ranges known to be affected.

showing 20 of 42
06

advisories (3)

Vendor and ecosystem advisories describing this.

  • SSA-508677SSA-508677: Use of Obsolete Function Vulnerability in SIMATIC WinCC before V82023-06-13csaf · siemens_psirtDE

    Before SIMATIC WinCC V8, legacy OPC services (OPC DA (Data Access), OPC HDA (Historical Data Access), and OPC AE (Alarms & Events)) were used per default. These services were designed on top of the Windows ActiveX and DCOM mechanisms and do not implement state-of-the-art security mechanisms for authentication and encryption of contents. Starting with WinCC V8.0 the legacy OPC services are no longer enabled by default in new installations. Siemens recommends to use OPC UA instead and to disable the legacy OPC services. For deployments where the legacy OPC services are still in use, ensure that only trusted users are part of the SIMATIC HMI group.

  • WID-SEC-W-2023-1427Siemens SIMATIC WinCC: Mehrere SchwachstellenDeutsch2023-06-12csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Siemens SIMATIC WinCC ausnutzen, um Sicherheitsvorkehrungen zu umgehen und seine Rechte zu erweitern.

  • ICSA-23-166-05Siemens SIMATIC WinCC2023-06-13icsa · cisa_csaf_otUS

    Before SIMATIC WinCC V8, legacy OPC services (OPC DA (Data Access), OPC HDA (Historical Data Access), and OPC AE (Alarms & Events)) were used per default. These services were designed on top of the Windows ActiveX and DCOM mechanisms and do not implement state-of-the-art security mechanisms for authentication and encryption of contents. Starting with WinCC V8.0 the legacy OPC services are no longer enabled by default in new installations. Siemens recommends to use OPC UA instead and to disable the legacy OPC services. For deployments where the legacy OPC services are still in use, ensure that only trusted users are part of the SIMATIC HMI group.

07

also known as (5)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtcert_bundNVDCVE.orgMITRE
published 2023-06-13modified 2026-10-23
09

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan