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PatchSiren cyber security CVE debrief

CVE-2026-61933 Microsoft CVE debrief

An out-of-bounds read in the Windows DWM Core Library allows an authorized attacker to disclose information locally. This vulnerability affects multiple versions of Windows 11 and Windows Server 2025. Microsoft has released a patch for this vulnerability. The vulnerability requires authorization and has a CVSS score of 5.5. Defenders responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply patches to prevent local information disclosure. The CVE Program record and NVD vulnerability detail provide information on this vulnerability.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

Defenders responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply patches to prevent local information disclosure.

Why it matters

CVE-2026-61933 is a medium-severity vulnerability in the Windows DWM Core Library that allows local information disclosure. Defenders responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply patches to prevent local information disclosure. The vulnerability requires authorization and has a CVSS score of 5.5.

  • Local information disclosure possible for authorized attackers
  • Patching required to prevent vulnerability exploitation
  • Affected systems need to be updated to prevent potential disclosure

Technical summary

An out-of-bounds read in the Windows DWM Core Library allows an authorized attacker to disclose information locally. This vulnerability affects multiple versions of Windows 11 and Windows Server 2025. The vulnerability requires authorization and has a CVSS score of 5.5. Microsoft has released a patch for this vulnerability. Defenders should review and update affected Windows 11 and Windows Server 2025 systems to prevent potential disclosure.

Defensive priority

Apply patches for CVE-2026-61933 to prevent local information disclosure

Recommended defensive actions

  • Apply patches for CVE-2026-61933 to prevent local information disclosure
  • Review and update affected Windows 11 and Windows Server 2025 systems
  • Monitor for potential local information disclosure

Evidence notes

The CVE Program record and NVD vulnerability detail provide information on this vulnerability. Microsoft has released a patch for this vulnerability. The vulnerability requires authorization and has a CVSS score of 5.5. Defenders responsible for Windows 11 and Windows Server 2025 systems should assess exposure and apply patches to prevent local information disclosure. The source item providing details on the vulnerability also confirms the patch release.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-61933 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-61933

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

  • CVE-2026-61933 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-61933

    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.