CVE-2025-13392 Synology CVE debrief

Who should care

Defenders responsible for Synology DiskStation Manager (DSM) systems, particularly those using versions before 7.2.2-72806-5 and 7.3.1-86003-1, should assess exposure and prioritize patching. This includes reviewing and updating authentication configurations, and monitoring for suspicious activity to mitigate potential security risks. Security teams and vulnerability management teams should also be aware of this vulnerability and take necessary actions to

Why it matters

CVE-2025-13392 is a high-severity vulnerability in Synology DiskStation Manager (DSM) that allows remote attackers to bypass authentication. Defenders should prioritize verifying and applying patches for affected DSM versions, reviewing and updating authentication configurations, and monitoring for suspicious activity.

• Remote attackers can bypass authentication
• Potential for unauthorized access to DSM systems
• Requires verification of patch application and authentication configurations

Technical summary

The vulnerability exists in Synology DiskStation Manager (DSM) versions before 7.2.2-72806-5 and 7.3.1-86003-1. An improper check for unusual or exceptional conditions allows remote attackers to bypass authentication with prior knowledge of the distinguished name (DN). This vulnerability has a high CVSS score of 8.1, indicating significant security concerns. Defenders should prioritize verifying and applying patches for affected DSM versions, as authentication bypass can lead to significant security risks. Additionally, defenders should review and update authentication configurations, and monitor for suspicious activity to mitigate potential security risks.

Defensive priority

Defenders should prioritize verifying and applying patches for affected DSM versions, as authentication bypass can lead to significant security risks.

Recommended defensive actions

• Verify and apply patches for affected DSM versions
• Review and update authentication configurations
• Monitor for suspicious activity
• Conduct vulnerability assessments
• Implement compensating controls
• Track exceptions and retest remediated assets
• Close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The CVE record was published on 2026-05-27T09:16:26.607Z and has not been modified since then. The NVD entry offers additional information on the vulnerability, including its severity and potential impact. Defenders should verify and apply patches for affected DSM versions, review and update authentication configurations, and monitor for suspicious activity.

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.