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Microsoft Security Response CenterCVE-2026-65775

Windows Win32k Elevation of Privilege Vulnerability

Severity not listedVendor CVSS 7.8 / 10 1 CVE Published Aug 11, 2026 at 7:00 AM UTC

Summary

Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

Products covered

A separate affected-products list was not included in the collected bulletin.

Remediation

Install KB5120238. Install KB5120242. Install KB5120229. Install KB5120249. Install KB5120233. Install KB5120228. Install KB5121003. Install KB5120994. Install KB5120240. Install KB5121000. Install KB5120418. Install KB5120386. Install KB5120385.

CVEs in this advisory 1

CVE-2026-65775
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • Severity changed from High to Unknown.
    • Removed affected products: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for....
    • Removed fixed versions: 6.2.9200.26280, 6.3.9600.23338, 10.0.14393.9418, 10.0.17763.9121, 10.0.19044.7663.
    • The vendor changed the advisory's last-updated date.
    • The vendor changed the advisory's last-updated date.
    • The vendor changed its remediation guidance.

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

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