CVE-2026-42987Critical

Windows Deployment Services (WDS) Remote Code Execution

MSRC advisory NVD CVE.org

Assessment

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

Severity: Critical
CVSS base score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact: Remote Code Execution
EPSS, next 30 days: 0.7%Higher than 51.6% of scored CVEs · FIRST model run 29 Sep 2026 · about EPSS
Public exploit code: No Nuclei template lists it
Exploitability: Exploitation Less Likely
Publicly disclosed: No
Customer action: Required: apply the update
Component: Windows Deployment Services
Weakness: CWE-416: Use After Free
Issued by: Microsoft
Published: 9 Jun 2026 · June 2026
Last revised: 9 Jun 2026

6 KBs

KB	Type	Restart	Applies to	Other CVEs
KB5094041	Monthly Rollup	Required	Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation)	All CVEs in KB5094041
KB5094042	Monthly Rollup	Required	Windows Server 2012, Windows Server 2012 (Server Core installation)	All CVEs in KB5094042
KB5094122	Security Update	Required	Windows Server 2016, Windows Server 2016 (Server Core installation)	All CVEs in KB5094122
KB5094123	Security Update	Required	Windows Server 2019, Windows Server 2019 (Server Core installation)	All CVEs in KB5094123
KB5094125	Security Update	Required	Windows Server 2025, Windows Server 2025 (Server Core installation)	All CVEs in KB5094125
KB5094128	Security Update	Required	Windows Server 2022, Windows Server 2022 (Server Core installation)	All CVEs in KB5094128

12 affected products