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CVE-2026-83849: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 21H2

0
Medium
VulnerabilityCVE-2026-83849cvecve-2026-83849cwe-125
Published: 10/13/2026 (10/13/2026, 18:59:53 UTC)
Source: CVE Database V5
Vendor/Project: Microsoft
Product: Windows 10 Version 21H2

Description

Out-of-bounds read in Windows Hello allows an authorized attacker to disclose information locally.

CVSS v3.1

Score 5.5medium

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Affected software

Microsoft

Windows 10 Version 21H2

Affected versions
>=10.0.19044.0 <10.0.19044.7807

Microsoft

Windows 10 Version 22H2

Affected versions
>=10.0.19045.0 <10.0.19044.7807

Microsoft

Windows 11 version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7652

Microsoft

Windows 11 Version 23H2

Affected versions
>=10.0.22631.0 <10.0.22631.7652

Microsoft

Windows 11 Version 24H2

Affected versions
>=10.0.26100.0 <10.0.26100.9711

Microsoft

Windows 11 Version 25H2

Affected versions
>=10.0.26200.0 <10.0.26200.9711

Microsoft

Windows 11 version 26H1

Affected versions
>=10.0.28000.0 <10.0.28000.3231

Microsoft

Windows 11 Version 26H2

Affected versions
>=10.0.26300.0 <10.0.26300.9711

Technical Details

Data Version
5.2
Assigner Short Name
microsoft
Date Reserved
2026-08-31T23:09:05.409Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
official-fix
Vendor Advisory Urls
[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83849","vendor":"Microsoft"}]

Threat ID: 6ace851a2cdf04f6569f4393

Added to database: 10/13/2026, 19:23:06 UTC

Last updated: 10/13/2026, 19:51:07 UTC

Views: 1

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