CVE-2026-57263 Siemens CVE debrief

Who should care

Organizations using LOGO! Soft Comfort (All versions < V9) should review and update to version V9 or later to mitigate potential vulnerability. Affected operators, platforms, and security teams should be aware of the vulnerability and take necessary actions to protect against offline dictionary or brute-force attacks. Vulnerability management and security teams should prioritize this vulnerability and implement compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

The project password feature in LOGO! Soft Comfort (All versions < V9) stores the password as an unsalted SHA-256 hash, allowing for efficient offline dictionary or brute-force attacks against the unsalted hash. This vulnerability has been identified in LOGO! Soft Comfort (All versions < V9). The affected products store the password as an unsalted SHA-256 hash, which could allow an attacker who has obtained the project file to perform efficient offline dictionary or brute-force attacks against the unsalted hash. Siemens has provided guidance on updating to version V9 or later to mitigate potential vulnerability.

Defensive priority

High-priority vulnerability requiring immediate attention due to potential for offline dictionary or brute-force attacks.

Recommended defensive actions

• Review and update LOGO! Soft Comfort to version V9 or later
• Implement additional security measures to protect against offline dictionary or brute-force attacks
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is needed to determine the full scope of the vulnerability and potential impact. The project password feature in LOGO! Soft Comfort (All versions < V9) stores the password as an unsalted SHA-256 hash, which could allow an attacker who has obtained the project file to perform efficient offline dictionary or brute-force attacks against the unsalted hash. Siemens has provided guidance on updating to version V9 or later to mitigate potential vulnerability. However, additional security measures should be implemented to protect against offline dictionary or brute-force attacks. The affected product deployments should be reviewed and updated to version V9 or later. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified.

Sources and 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.