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PatchSiren cyber security CVE debrief

CVE-2026-40537 Synology CVE debrief

A server-side request forgery (SSRF) vulnerability exists in Synology DiskStation Manager (DSM) versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2. This vulnerability allows remote authenticated users to obtain non-sensitive information. The SSRF vulnerability can be exploited by authenticated users to access non-sensitive information, potentially leading to information disclosure. Defenders should assess potential exposure and impact, focusing on internet-exposed DiskStation Manager instances. They should verify the version of DiskStation Manager and apply updates if necessary, restrict access to DiskStation Manager instances, and monitor for suspicious activity. The

Vendor
Synology
Product
DiskStation Manager (DSM)
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-18
Original CVE updated
2026-09-18
Advisory published
2026-09-18
Advisory updated
2026-09-18

Who should care

Defenders responsible for Synology DiskStation Manager instances, particularly those with internet-exposed systems, should assess potential exposure and impact.

Why it matters

The SSRF vulnerability in Synology DiskStation Manager allows authenticated users to obtain non-sensitive information. Defenders should prioritize verifying exposure, assessing potential impact, and applying updates if necessary.

  • Potential information disclosure
  • Need for version verification and updates
  • Monitoring for suspicious activity
  • Assessing exposure of DiskStation Manager instances

Technical summary

The SSRF vulnerability in Synology DiskStation Manager allows remote authenticated users to obtain non-sensitive information. Affected versions include those before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2. The vulnerability can be exploited by authenticated users to access non-sensitive information, potentially leading to information disclosure. To mitigate this vulnerability, defenders should prioritize verifying exposure and assessing potential impact, focusing on systems with internet-exposed DiskStation Manager instances. They should verify the DiskSt

Defensive priority

Defenders should prioritize verifying exposure and assessing potential impact, focusing on systems with internet-exposed DiskStation Manager instances.

Recommended defensive actions

  • Verify DiskStation Manager version and apply updates if necessary
  • Restrict access to DiskStation Manager instances
  • Monitor for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the SSRF vulnerability in Synology DiskStation Manager. Vendor advisory Synology_SA_26_06 is also available.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40537 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40537

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40537 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40537

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.