What is CVE-2026-62798?

CVE-2026-62798 is a medium-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-08-11.

How severe is CVE-2026-62798?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Microsoft Windows 11 Version 23h2

CVE-2026-62798

Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Windows 11 Version 23h2 — versions 10.0.22631.0
Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
Microsoft Windows Server 2025 — versions 10.0.26100.0
Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0

Weakness classification (CWE)

CWE-822 — Untrusted Pointer Dereference

References

Win32k Information Disclosure Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-62798?: CVE-2026-62798 is a medium-severity vulnerability in Microsoft Windows 11 Version 23h2, classified under Untrusted Pointer Dereference. CVSS score: 5.5/10. Published 2026-08-11.
How severe is CVE-2026-62798?: Medium severity. CVSS v3 base score is 5.5 out of 10.