CVE-2026-54107: Windows Win32k Elevation of Privilege Vulnerability

highpublic exploitCVSS 8.8CVE-2026-54107

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoft product: Windows Win32k Privilege escalation

What: A race condition in Windows Win32K allows an authorized attacker to elevate privileges locally.
Who is affected: Authorized users of Windows Win32k are affected.
Urgency: Remediation is urgent due to the high severity and potential for local privilege escalation.
Action: Install the latest security updates for Windows Win32k.

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

⚡ Watch Windows Win32k

Get an email when a new Windows Win32k advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54107

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.

Low exploitation riskCVE-2026-541070.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-54107	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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