CVE-2026-72971

medium

Description

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.

References

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

https://www.helpnetsecurity.com/2026/08/12/august-2026-patch-tuesday-cve-2026-68820/

https://thehackernews.com/2026/08/shieldbreak-zero-day-poc-claims.html

https://securityaffairs.com/197048/security/microsoft-patch-tuesday-for-august-2026-fixed-a-zero-day-and-wormable-rce.html

https://www.securityweek.com/august-2026-patch-tuesday-microsoft-fixes-421-cves-one-exploited-zero-day/

https://krebsonsecurity.com/2026/08/microsoft-plugs-nearly-400-security-holes/

https://www.tenable.com/blog/microsofts-august-2026-patch-tuesday-addresses-398-cves-cve-2026-68820

Details

Source: Mitre, NVD

Published: 2026-08-11

Updated: 2026-08-14

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 5.5

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