CVE-2026-72971

MEDIUM CVSS 3.1: 5.5
Updated Aug 11, 2026
Microsoft
Parameter Value
CVSS 5.5 (MEDIUM)
Affected Versions 10.0.28000.0 — 10.0.28000.2704
Fixed In 10.0.28000.2704
Type CWE-59 (Improper Link Resolution)
Vendor Microsoft
Public PoC No

Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Microsoft Windows_11_26h1
cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*
10.0.28000.0 10.0.28000.2704