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 8.2
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-06-09
Advisory published: 2026-06-09
Advisory updated: 2026-06-09

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.

Official resources

CVE-2026-24349 was published on 2026-06-09T10:16:42.967Z and modified on 2026-06-09T13:49:39.993Z.