CVE-2026-69820 json
Windows Hello Elevation of Privilege Vulnerability
published 2026-09-08 2 mo ago modified 2026-10-31 8 d ago also EUVD-2026-73640
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in Windows Hello allows an authorized attacker to elevate privileges locally.
Patch / fix
- Microsoft Windows 10 Version 21H2 10.0.19044.7725
- Microsoft Windows 10 Version 22H2 10.0.19045.7725
- Microsoft Windows 11 version 23H2 10.0.22631.7582
- Microsoft Windows 11 Version 24H2 10.0.26100.9445
- Microsoft Windows 11 Version 25H2 10.0.26200.9445
- Microsoft Windows 11 version 26H1 10.0.28000.2954
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Windows 10 Version 21H2
- Microsoft Windows 10 Version 22H2
- Microsoft Windows 11 version 23H2
- Microsoft Windows 11 Version 24H2
- Microsoft Windows 11 Version 25H2
- Microsoft Windows 11 version 26H1
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-69820
vendor-advisory, patch
Sources
- CVE List CVE-2026-69820
- NVD CVE-2026-69820
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