CVE-2026-70019

Published: Sep 8, 2026Modified: Sep 16, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: secure@microsoft.com (Secondary)

Description

Windows hard link in Windows Compressed Folder allows an unauthorized attacker to disclose information over a network.

Affected (9)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2025

5 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2025

Configuration A

9 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows Server 2025	version < 10.0.26100.33438

Related CWEs

Windows Hard Link

The product, when opening a file or directory, does not sufficiently handle when the name is associated with a hard link to a target that is outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70019

Source: secure@microsoft.com

Vendor AdvisoryPatch

Timeline

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