CVE-2026-72971

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.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-25)

CWE

CWE-59

Published

2026-08-11

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

Affected

• microsoft:windows_11_26h1

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72971

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