CVE-2026-70563

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

8.1

Vector

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

Exploitability: 2.8 / Impact: 5.2

Source: secure@microsoft.com (Secondary)

Description

Improper link resolution before file access ('link following') in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

Affected (24)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

13 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

24 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9512
Microsoft Windows 10 1607	Before 10.0.14393.9512
Microsoft Windows 10 1809	Before 10.0.17763.9245
Microsoft Windows 10 1809	Before 10.0.17763.9245
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 21h2	Before 10.0.19044.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 10 22h2	Before 10.0.19045.7725
Microsoft Windows 11 23h2	Before 10.0.22631.7582
Microsoft Windows 11 23h2	Before 10.0.22631.7582
Microsoft Windows 11 24h2	Before 10.0.26100.9445
Microsoft Windows 11 24h2	Before 10.0.26100.9445
Microsoft Windows 11 25h2	Before 10.0.26200.9445
Microsoft Windows 11 25h2	Before 10.0.26200.9445
Microsoft Windows 11 26h1	Before 10.0.28000.2954
Microsoft Windows 11 26h1	Before 10.0.28000.2954
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9512
Microsoft Windows Server 2019	Before 10.0.17763.9245
Microsoft Windows Server 2022	Before 10.0.20348.5622
Microsoft Windows Server 2025	Before 10.0.26100.33438

Related CWEs

Improper Link Resolution Before File Access ('Link Following')

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70563

Source: secure@microsoft.com

Vendor AdvisoryPatch

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