Windows Win32k Elevation of Privilege Vulnerability
Plan PatchCVSS 7.8CVE-2026-83883Oct 13, 2026
Microsoft
IT in OT - Windows Server and Active Directory are widely deployed in OT environments
Attack path
Attack VectorLocal
Auth RequiredLow
ComplexityLow
User InteractionNone needed
Summary
Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
What this means
What could happen
Could allow full system compromise — read data, modify settings, and disrupt operations
Who's at risk
Organizations in critical infrastructure using Microsoft equipment
How it could be exploited
Attacker would need local or console access to the device with basic access credentials. The attack is straightforward with no special conditions
Exploitability
Unlikely to be exploited — EPSS score 0.3%
Affected products (28)
28 with fix
ProductAffected VersionsFix Status
Remediation & Mitigation
0/1
Long-term hardening
0/1Exploitation assessment: Exploitation Less Likely. Apply the 2026-Oct security update.
CVEs (1)
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