SSA-751328: Recoverable Hardcoded AES Master Key in Siemens LOGO! Soft Comfort
Siemens LOGO! Soft Comfort contains multiple vulnerabilities in its project-file encryption and password handling mechanisms. A local attacker could exploit these vulnerabilities to extract the master key, allowing them to decrypt project data or remove project passwords. The lack of password salting enables offline dictionary or brute-force attacks against the password hashes. Successful exploitation could result in unauthorized access to, or modification of, sensitive project logic and configurations. Siemens has released a new version for LOGO! Soft Comfort and recommends to update to the latest version.
describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-57263US | — | — | ||
A vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). The project password feature in the affected products stores the password as an unsalted SHA-256 hash… | ||||
| CVE-2026-57262US | —OT elevated | — | ||
A vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). Affected products use a static, hardcoded AES master key to encrypt project files. This could allow a… | ||||
references
External citations — patches, advisories, analysis.
remediations (2)
- FixedLOGO! Soft Comfort
Update to V9 or later version Note: A hardware upgrade to LOGO! V9 BM or later is also required to avoid compatibility mode, in which the vulnerabilities addressed by this advisory remain present.
- FixedLOGO! Soft Comfort
Update to V9 or later version Note: A hardware upgrade to LOGO! V9 BM or later is also required to avoid compatibility mode, in which the vulnerabilities addressed by this advisory remain present.
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