CVE-2026-42987 — Windows Deployment Services (WDS) Remote Code Execution

Executive Summary

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

Overview

8.1

CVSS HIGH

Critical

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Jun 9 2026

Last Updated Jun 9 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00441 — 0.3506 percentile

NVD CVSS 8.1 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 7.1

EPSS Score

0.00441

probability of exploitation in the next 30 days

0.3506 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

12 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2012	`5094042 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 (Server Core installation)	`5094042 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2	`5094041 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2 (Server Core installation)	`5094041 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2016	`5094122 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`5094122 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019	`5094123 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019 (Server Core installation)	`5094123 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2022	`5094128 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2022 (Server Core installation)	`5094128 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2025	`5094125 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2025 (Server Core installation)	`5094125 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

6 patches

Article	Type	Restart
`5094042`	Monthly Rollup	Yes
`5094041`	Monthly Rollup	Yes
`5094122`	Security Update	Yes
`5094123`	Security Update	Yes
`5094128`	Security Update	Yes
`5094125`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

R4nger with Kunlun Lab & Zhiniang Peng with HUST

References

MSRC Advisory MITRE NVD