Untrusted Pointer Dereference in Microsoft Windows and Windows Server - CVE-2026-62798
Published: August 12, 2026
Vulnerability identifier: #VU141774
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62798
CWE-ID: CWE-822
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to untrusted pointer dereference in Windows Win32K when handling crafted local input. A local user can trigger the dereference to disclose sensitive information.
Successful exploitation can leak one byte of kernel memory.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-62798
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7517, 11 24H2 10.0.26100.9106, 11 24H2 10.0.26100.9168, 11 25H2 10.0.26200.9168, 11 26H1 10.0.28000.2704
Windows Server - addressed in versions 2025 10.0.26100.33222, 2025 10.0.26100.33296
Windows Server - addressed in versions 2025 10.0.26100.33222, 2025 10.0.26100.33296