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ICS Advisories

Advisories specifically aimed at industrial control systems — from CISA ICS-CERT and directly from vendors (including Siemens, ABB, Schneider Electric, WAGO and Phoenix Contact) — including revision history (initial publication, Update A, Update B) and linked CVEs.

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Advisory data: live connection— last retrieved: 7 November 2026 at 15:53.

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SSA-493396

SSA-493396: Deserialization Vulnerability in Siemens Engineering Platforms

Siemens — SIMATIC S7-PLCSIM V17

Siemens ProductCERThigh

Published

12 August 2025

Last update

13 October 2026

Linked CVEs

Affected sectors

Risk evaluation

Affected products do not properly sanitize user-controllable input when parsing project files. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

Mitigation summary

Only open projects from trusted sources.

Revision history (4)
  1. Initial publication — 12 August 2025

    Publication Date

  2. Update A — 14 October 2025

    Added fix for TIA Portal V20

  3. Update B — 9 December 2025

    Added fix for Totally Integrated Automation Portal (TIA Portal) V17

  4. Update C — 13 October 2026

    Added fix version for SIMATIC STEP 7 V18, and SIMATIC WinCC V18

Official source: Siemens ProductCERT