Windows hard link in Microsoft Windows and Windows Server - CVE-2026-70019
Published: September 9, 2026
Vulnerability identifier: #VU148021
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-70019
CWE-ID: CWE-65
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read files from the file system.
The vulnerability exists due to a Windows hard link in Windows Compressed Folder when processing a compressed folder containing a Windows hard link. A remote attacker can use a Windows hard link in a compressed folder to read files from the file system.
User interaction is required.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-70019
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7582, 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - update to 2025 10.0.26100.33438
Windows Server - update to 2025 10.0.26100.33438