CVE-2026-62877

Windows Win32k Elevation of Privilege Vulnerability

State: Published
Severity: 7.8 High
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Jul 14, 2026

Description

Stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
Microsoft Office 365 for MacMicrosoft	1.0.0 to before 16.112.26090911Affected
Microsoft Office for AndroidMicrosoft	16.0.1 to before 16.0.20430.20000Affected
Microsoft Office LTSC for Mac 2021Microsoft	16.0.1 to before 16.112.26090911Affected
Microsoft Office LTSC for Mac 2024Microsoft	16.0.0 to before 16.112.26090911Affected

References

Windows Win32k Elevation of Privilege Vulnerabilityvendor-advisorypatch

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