CVE-2026-72971: windows 11 26h1 before 10.0.28000.2704 (exclusive); +1 more affected products

CVE-2026-72971. CVSS 3.1 base score 5.5 (MEDIUM, Vendor/CNA). EPSS 0.00364 (percentile 0.29013), scored 22-Oct-2026.

Affected technology

windows 11 26h1 · before 10.0.28000.2704 (exclusive)
microsoft

Windows 11 version 26H1 · 10.0.28000.0 to before 10.0.28000.2704
Microsoft

Description’s affected range: before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys)

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

An authorized attacker can perform tampering locally. Vendor/CNA’s CVSS 3.1 assessment (base score 5.5/10) rates confidentiality and availability impact as none; integrity impact as high.

Published 24-Oct-2026 01:44 UTC

CWE: CWE-59
CCR priority: 22.1 /100 (P4)
CVSS 3.1: 5.5 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N · Vendor/CNA
EPSS: 0.00364 · percentile 0.29013 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-72971.html