CVE-2026-50364

Windows Backup Service Elevation of Privilege Vulnerability

State: Published
Severity: 7.3 High
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: Jun 4, 2026

Description

Improper link resolution before file access ('link following') in Windows Server Backup allows an authorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')

Affected Products

Product	Versions
Windows 10 Version 21H2Microsoft	10.0.19044.0 to before 10.0.19044.7548Affected
Windows 10 Version 22H2Microsoft	10.0.19045.0 to before 10.0.19045.7548Affected
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.8875Affected
Windows 11 Version 25H2Microsoft	10.0.26200.0 to before 10.0.26200.8875Affected
Windows 11 version 26H1Microsoft	10.0.28000.0 to before 10.0.28000.2525Affected

References

Windows Backup Service Elevation of Privilege Vulnerabilityvendor-advisorypatch

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