Windows Kernel Elevation of Privilege Vulnerability

MonitorCVSS 5.5CVE-2026-83736Oct 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

Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.

What this means
What could happen
Could disrupt device operations or cause loss of view/control
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 0.4%
Affected products (20)
20 with fix
ProductAffected VersionsFix Status
Windows Server 2022All versionsBuild 10.0.20348.5761
Windows Server 2022 (Server Core installation)All versionsBuild 10.0.20348.5761
Windows 10 Version 21H2 for 32-bit SystemsAll versionsBuild 10.0.19044.7807
Windows 10 Version 21H2 for ARM64-based SystemsAll versionsBuild 10.0.19044.7807
Windows 10 Version 21H2 for x64-based SystemsAll versionsBuild 10.0.19044.7807
Remediation & Mitigation
0/1
Long-term hardening
0/1
Exploitation assessment: Exploitation Less Likely. Apply the 2026-Oct security update.
API: /api/v1/advisories/34c675e4-62a8-45e6-95a3-a139ba2e998e

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