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PatchSiren cyber security CVE debrief

CVE-2026-24349 Siemens CVE debrief

A vulnerability has been identified in SIMATIC WinCC Unified PC Runtime V16 (All versions), SIMATIC WinCC Unified PC Runtime V17 (All versions), SIMATIC WinCC Unified PC Runtime V18 (All versions), SIMATIC WinCC Unified PC Runtime V19 (All versions), SIMATIC WinCC Unified PC Runtime V20 (All versions), SIMATIC WinCC Unified PC Runtime V21 (All versions < V21 Update 2). Insufficient protection of key material in WinCC Certificate Manager that could allow an attacker to extract sensitive information.

Vendor
Siemens
Product
SIMATIC WinCC Unified PC Runtime V16
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-23
Advisory published
2026-06-09
Advisory updated
2026-06-23

Who should care

Users of SIMATIC WinCC Unified PC Runtime V16, V17, V18, V19, V20, and V21 (prior to Update 2) should consider updating to the latest version or applying the necessary patches.

Technical summary

The vulnerability, tracked as CVE-2026-24349, is caused by insufficient protection of key material in WinCC Certificate Manager. This could allow an attacker to extract sensitive information.

Defensive priority

HIGH

Recommended defensive actions

  • Apply the necessary patches or updates to SIMATIC WinCC Unified PC Runtime.
  • Review and update security configurations for WinCC Certificate Manager.

Evidence notes

The vendor is identified as Siemens based on the evidence from reference_domain_candidate.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-24349 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-24349

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-24349 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-24349

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.