CVE-2026-65775: Windows Win32k Elevation of Privilege Vulnerability

CSIRTS triage

What

Use-after-free in Windows Win32K allows privilege elevation.

Who is affected

Authorized attackers with local access to affected Windows systems.

Urgency

High severity (CVSS 7.8) with no public exploitation; prioritize remediation.

Action

Apply the latest Windows security update addressing CVE-2026-65775.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 7.8

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65775

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Moderate exploitation riskCVE-2026-657752.4% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 83% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownexploitedNCSC-2026-0284 [1.00] [M/H] Vulnerabilities patched in Microsoft Windowsncsc-nl
• highCVE-2026-65775: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.nvd