SIMATIC WinCC Unified PC Runtime: Key Material Leakage in CertMgr
CVE-2026-24349 Published on June 9, 2026
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.
Weakness Type
Cleartext Storage in a File or on Disk
The application stores sensitive information in cleartext in a file, or on disk. The sensitive information could be read by attackers with access to the file, or with physical or administrator access to the raw disk. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Products Associated with CVE-2026-24349
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Affected Versions
Siemens SIMATIC WinCC Unified PC Runtime V16:- Before * is affected.
- Before * is affected.
- Before * is affected.
- Before * is affected.
- Before * is affected.
- Before V21 Update 2 is affected.