CVE-2026-72971CWE-59

CVE-2026-72971

Medium · published August 11, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
29.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00364 · 29.0th percentile
Weakness
CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published
2026-08-11T21:19Z
Affected products (2)
ProductVersionsFixed in
microsoft/windows_11_26h1< 10.0.28000.270410.0.28000.2704
microsoft/windows_11_26h1< 10.0.28000.270410.0.28000.2704
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72971 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:05Z
    Windows Container Isolation FS Filter Driver (unionfs.sys) Tampering Vulnerability
    cvelistv5