Windows Kernel Elevation of Privilege Vulnerability
MonitorCVSS 5.5CVE-2026-50377Jul 14, 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
Out-of-bounds read in Windows Kernel that allows an authorized attacker to elevate privileges locally. Affects Windows 10 (versions 1607, 1809, 21H2, 22H2), Windows 11 (versions 24H2, 25H2, 26H1), Windows Server 2016, 2019, 2022, and 2025 across 32-bit, x64, and ARM64 architectures. Exploitation assessed as less likely.
What this means
What could happen
A user with local access to a Windows system could exploit an out-of-bounds read in the kernel to gain elevated privileges, potentially allowing them to access sensitive data on systems like HMIs or engineering workstations used to control industrial equipment.
Who's at risk
Any organization running Windows 10, Windows 11, or Windows Server systems should care, particularly those with HMIs (Human Machine Interfaces), engineering workstations, or any Windows-based control system that could be compromised through local access. This affects 32-bit, x64, and ARM64 systems across multiple Windows versions and editions.
How it could be exploited
An attacker with a local user account on the Windows system would trigger the out-of-bounds read in the kernel memory to elevate their privilege level. This could occur if an attacker has physical access to a machine, gains access through a compromised user account, or if malicious code is already running on the system.
Prerequisites
- Local user account on the Windows system
- Ability to execute code on the affected system
requires local accesslow complexityno authentication required from privileged account
Exploitability
Unlikely to be exploited — EPSS score 0.4%
Affected products (23)
23 with fix
ProductAffected VersionsFix Status
Remediation & Mitigation
0/3
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXApply the 2026-Jul security update to Windows 10, Windows 11, or Windows Server systems
Long-term hardening
0/2HARDENINGRestrict local console and Remote Desktop access to Windows HMIs and engineering workstations to authorized personnel only
HARDENINGDisable local user account creation on systems that do not require it
CVEs (1)
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