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CVE-2026-40532 Synology CVE debrief

CVE-2026-40532 is a medium-severity vulnerability in Synology DiskStation Manager (DSM) that allows remote authenticated users to obtain sensitive information via a direct request ('forced browsing') in Wallpaper Path. The CVE record was published on 2026-09-18T09:16:40.473Z and has not been modified since then. This vulnerability exists in DSM versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2. Defenders should assess exposure and prioritize verification and mitigation efforts, especially for remote authenticated users with access to Wallpaper Path. Verification and compensating controls are crucial for exposed deployments.

Vendor
Synology
Product
DiskStation Manager (DSM)
CVSS
MEDIUM 6.5
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 (DSM) deployments should assess exposure and prioritize verification and mitigation efforts, especially for remote authenticated users with access to Wallpaper Path.

Why it matters

CVE-2026-40532 is a medium-severity vulnerability in Synology DiskStation Manager (DSM) that allows remote authenticated users to obtain sensitive information via a direct request ('forced browsing') in Wallpaper Path. Defenders should prioritize verifying exposure and implementing compensating controls for remote authenticated users with access to Wallpaper Path in DSM versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2.

  • Potential sensitive information disclosure for remote authenticated users with access to Wallpaper Path
  • Verification priority for DSM versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2
  • Compensating controls may be necessary for exposed deployments

Technical summary

The vulnerability exists in Wallpaper Path in Synology DiskStation Manager (DSM) versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2. A remote authenticated user can obtain sensitive information by making a direct request ('forced browsing') to Wallpaper Path.

Defensive priority

Defenders should prioritize verifying exposure and implementing compensating controls for remote authenticated users with access to Wallpaper Path in DSM versions before 7.2.1-69057-10, 7.2.2-72806-7, and 7.3.2-86009-2.

Recommended defensive actions

  • Verify exposure by checking DSM versions and ensuring Wallpaper Path access controls are in place
  • Implement compensating controls for remote authenticated users with access to Wallpaper Path
  • Monitor for potential sensitive information disclosure

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability, with the Synology security advisory being the primary source for affected versions and mitigation guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40532 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40532

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

  • CVE-2026-40532 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40532

    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.