CVE-2023-28829

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-13 · updated 2026-10-23
Weakness: CWE-477

Description

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.

Affected products

Siemens Simatic Net Pc Software: 14.0, 15.0
Siemens SIMATIC PCS 7: 8.2, 9.0, 9.1
Siemens Simatic Wincc: before 8.0 — fixed in 8.0
Siemens Sinaut St7Sc: all versions

How to fix

Upgrade to a fixed version: Siemens Simatic Wincc 8.0. Check the vendor advisory for mitigations.

References

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