CVE-2025-59287 — Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

Executive Summary

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

Overview

9.8

CVSS CRITICAL

Critical

MS Severity

Not Exploited

MS Exploit Status

More Likely

MS Exploit Likelihood

Category Remote Code Execution

Released Oct 14 2025

Last Updated Oct 14 2025

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.99962 — 0.99976 percentile

NVD CVSS 9.8 CRITICAL — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 8.8

EPSS Score

0.99962

probability of exploitation in the next 30 days

0.99976 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

9 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2012	`5070887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2012 (Server Core installation)	`5070887 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2	`5070886 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2 (Server Core installation)	`5070886 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016	`5070882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`5070882 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019	`5070883 (Security Update)`	Critical	Remote Code Execution	Maybe
Windows Server 2019 (Server Core installation)	`5070883 (Security Update)`	Critical	Remote Code Execution	Maybe
Windows Server 2022 5070884 (Security Update) 5070892 (Standalone Security Update) Critical Remote Code Execution Base: 9.8 Temporal: 8.8 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C 10.0.20348.4297 Yes None Windows Server 2022 (Server Core installation) 5070884 (Security Update) 5070892 (Standalone Security Update) Critical Remote Code Execution Base: 9.8 Temporal: 8.8 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C 10.0.20348.4297 Yes None Windows Server 2022, 23H2 Edition (Server Core installation)	`5070879 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

5 patches

Article	Type	Restart
`5070887`	Security Update	Yes
`5070886`	Security Update	Yes
`5070882`	Security Update	Yes
`5070883`	Security Update	Maybe
`5070879`	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

Markus Wulftange, MEOW, f7d8c52bec79e42795cf15888b85cbad

References

MSRC Advisory MITRE NVD