CVE-2025-27728: Windows Kernel-Mode Driver Elevation of Privilege Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-08 · updated 2026-08-10
Weakness: CWE-125

Description

Out-of-bounds read in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Windows 11: before 10.0.26100.3775 — fixed in 10.0.26100.3775
Microsoft Windows Server 2025: before 10.0.26100.3775 — fixed in 10.0.26100.3775
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.3775 — fixed in 10.0.26100.3775
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.3775 — fixed in 10.0.26100.3775

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.26100.3775; Microsoft Windows Server 2025 10.0.26100.3775; Microsoft Windows 11 10.0.26100.3775; Microsoft Windows Server 2025 10.0.26100.3775. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27728

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