CVE-2026-69784Critical

Windows Hello Elevation of Privilege Vulnerability

Assessment

Use after free in Windows Hello allows an authorized attacker to elevate privileges locally.

Severity: Critical
CVSS base score: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact: Elevation of Privilege
EPSS, next 30 days: 0.3%Higher than 24.1% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
Exploitability: Exploitation Unlikely
Publicly disclosed: No
Customer action: Required: apply the update
Component: Windows Hello
Weakness: CWE-416: Use After Free
Issued by: Microsoft
Published: 8 Sep 2026 · September 2026
Last revised: 8 Sep 2026

4 KBs

KB	Type	Restart	Applies to	Other CVEs
KB5122878	Security Update	Required	Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 more	All CVEs in KB5122878
KB5122880	Security Update	Required	Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems	All CVEs in KB5122880
KB5124008	Security Update	Required	Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 1 more	All CVEs in KB5124008
KB5124012	Security Update	Required	Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems	All CVEs in KB5124012

ESU, Windows

14 affected products