CVE-2026-42987

Published: Jun 9, 2026Modified: Jun 11, 2026

8.1

Vector

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

Exploitability: 2.2 / Impact: 5.9

Source: secure@microsoft.com

Description

Use after free in Windows Deployment Services allows an unauthorized attacker to execute code over a network.

Affected (6)

Products: Microsoft: Windows Server 2012, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

5 products

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

6 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9234
Microsoft Windows Server 2019	Before 10.0.17763.8880
Microsoft Windows Server 2022	Before 10.0.20348.5256
Microsoft Windows Server 2025	Before 10.0.26100.32995

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42987

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.