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CVE-2026-69474 Microsoft CVE debrief

CVE-2026-69474 is a use-after-free vulnerability in the Windows Overlay Filter that allows an authorized attacker to disclose information over a network. The vulnerability has a CVSS score of 4.8 and is classified as MEDIUM severity. Microsoft has released a patch for this vulnerability. Defenders responsible for Windows systems, especially those exposed to untrusted networks or users, should assess exposure and apply patches or mitigations. The vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. Inventory checks and monitoring for suspicious activity related to this vulnerability are recommended.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 4.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-21
Advisory published
2026-09-08
Advisory updated
2026-09-21

Who should care

Defenders responsible for Windows systems, especially those exposed to untrusted networks or users, should assess exposure and apply patches or mitigations.

Why it matters

CVE-2026-69474 is a use-after-free vulnerability in the Windows Overlay Filter that allows an authorized attacker to disclose information over a network. Defenders should prioritize patching or mitigating vulnerable Windows systems, especially those exposed to untrusted networks or users, to prevent potential information disclosure.

  • Authorized attackers may exploit this vulnerability to disclose sensitive information over a network.
  • Defenders should prioritize patching or mitigating vulnerable Windows systems to prevent potential information disclosure.
  • Inventory checks and monitoring for suspicious activity related to this vulnerability are recommended.

Technical summary

The vulnerability is a use-after-free issue in the Windows Overlay Filter that allows an authorized attacker to disclose information over a network. The CVSS score is 4.8, indicating a MEDIUM severity vulnerability. Affected systems include various versions of Windows 10, Windows 11, and Windows Server.

Defensive priority

Apply patches or mitigations to vulnerable Windows systems, especially those exposed to untrusted networks or users.

Recommended defensive actions

  • Apply patches or mitigations to vulnerable Windows systems, especially those exposed to untrusted networks or users.
  • Review and update inventory of Windows systems to ensure they are running patched versions.
  • Monitor systems for suspicious activity related to this vulnerability.

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, its severity, and affected systems. Microsoft has released a patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69474 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69474

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

  • CVE-2026-69474 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69474

    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.