CVE-2026-57262
View CSAF Summary 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. The following versions of Siemens LOGO! Soft Comfort are affected: LOGO! Soft Comfort vers:intdot/<9 (CVE-2026-57262, CVE-2026-57263) CVSS Vendor Equipment Vulnerabilities v3 6.8 Siemens Siemens LOGO! Soft Comfort Use of Hard-coded Cryptographic Key, Use of a One-Way Hash without a Salt Background Critical Infrastructure Sectors: Commercial Facilities, Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-57262 Affected products use a static, hardcoded AES master key to encrypt project files. This could allow a local attacker to extract the master key from the application files or memory and use it to decrypt project files or remove project passwords entirely without knowing the actual user-defined password. View CVE Details Affected Products Siemens LOGO! Soft Comfort Vendor: Siemens Product Version: LOGO! Soft Comfort < V9 Product Status: known_affected Remediations Vendor fix 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. Relevant CWE: CWE-321 Use of Hard-coded Cryptographic Key Metrics CVSS Version Base Score Base Severity Vector String 3.1 6.8 MEDIUM CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N CVE-2026-57263 The
CSIRTS triage
- What
- Hard-coded cryptographic key and lack of password salting in project-file encryption and password mechanisms enabling master key extraction and offline brute-force attacks.
- Who is affected
- LOGO! Soft Comfort versions prior to 9.
- Urgency
- Critical; hard-coded key and unsalted password hashes allow decryption and project data compromise.
- Action
- Upgrade to LOGO! Soft Comfort version 9 or later.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Advisory coverage (3)
- criticalSiemens LOGO! Soft Comfortcisa · 2026-08-13
- mediumCVE-2026-57262: A vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). Affected produc…nvd · 2026-08-11
- unknownNCSC-2026-0282 [1.00] [M/H] Vulnerabilities fixed in Siemens productsncsc-nl · 2026-08-11
External references
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