CVE-2026-72971

CVE Enrichment

CVSS: 5.5 MEDIUM
EPSS: 0.36%
EPSS Percentile: 29.07%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 12-Aug-2026 00:19
Last Modified: 24-Oct-2026 22:10
EPSS Date: 2026-10-24
CWE: CWE-59

CVSS Vector


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

Affected Products / Versions

microsoft / windows_11_26h1
Version / affected range: * · before (exclusive) 10.0.28000.2704
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
microsoft / windows_11_26h1
Version / affected range: * · before (exclusive) 10.0.28000.2704
cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*

References

[email protected]

Last enrichment sync: 25-Oct-2026 15:19
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-72971, a link following in the Windows Container Isolation FS Filter Driver (unionfs.sys) that could lead to local tampering, was also flagged as publicly disclosed, but Microsoft believes it is unlikely to be Microsoft Fixes 421 CVEs in August 2026 Patch Tuesday, Including Exploited Zero-Day

CVE (12)

People (2)

Threat Actors (1)

MITRE ATT&CK (1)

Vendors (1)

Products (12)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.