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CVE-2026-50435 Microsoft CVE debrief

A buffer over-read vulnerability exists in the Windows Overlay Filter, which could allow an authorized attacker to elevate privileges locally. The vulnerability has a CVSS score of 7.8 and is classified as HIGH severity. This vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. The vulnerability is caused by a buffer over-read in the Windows Overlay Filter. An authorized attacker could exploit this vulnerability to elevate privileges locally. High priority should be given to patching and mitigating this vulnerability, as it could allow an authorized attacker to elevate privileges locally.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-23
Advisory published
2026-07-14
Advisory updated
2026-07-23

Who should care

Administrators and users of Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes ensuring that all Windows systems are up-to-date with the latest security patches and implementing additional security controls to prevent local privilege escalation.

Technical summary

The vulnerability is caused by a buffer over-read in the Windows Overlay Filter. An authorized attacker could exploit this vulnerability to elevate privileges locally. The vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. The CVSS score is 7.8 and is classified as HIGH severity.

Defensive priority

High priority should be given to patching and mitigating this vulnerability, as it could allow an authorized attacker to elevate privileges locally.

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Ensure that all Windows systems are up-to-date with the latest security patches
  • Monitor system logs for suspicious activity
  • Implement additional security controls to prevent local privilege escalation
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T18:17:47.547Z and was last modified on 2026-07-21T04:14:31.300Z. The NVD entry is currently Analyzed. This vulnerability affects various versions of Windows 10, Windows 11, and Windows Server. The buffer over-read vulnerability exists in the Windows Overlay Filter, which could allow an authorized attacker to elevate privileges locally. The CVSS score is 7.8 and is classified as HIGH severity. Administrators and users of Windows 10, Windows 11, and Windows Server systems should be aware of this vulnerability and take necessary precautions to mitigate the risk.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50435 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50435

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

  • CVE-2026-50435 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50435

    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.