CVE-2025-59287

Name: CVE-2025-59287
Creator: NVD / NIST
Published: 2025-10-14T17:16:11.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.96%

Last modified Jun 17, 2026

CVE-2025-59287 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.96% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

99.96%

100.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Nov 14, 2025.

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Microsoft	Windows Server 2012	All versions
Microsoft	Windows Server 2012	r2
Microsoft	Windows Server 2016	< 10.0.14393.8524
Microsoft	Windows Server 2019	< 10.0.17763.7922
Microsoft	Windows Server 2022	< 10.0.20348.4297
Microsoft	Windows Server 2022 23h2	< 10.0.25398.1916
Microsoft	Windows Server 2025	< 10.0.26100.6905

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287Vendor Advisory
https://hawktrace.com/blog/CVE-2025-59287Exploit, Third Party Advisory
https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/Press/Media Coverage
https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-serviceThird Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-serviceMitigation, Third Party Advisory
https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287Third Party Advisory, US Government Resource

Timeline

Published: Oct 14, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-59287?

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

How severe is CVE-2025-59287?

CVE-2025-59287 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.96% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2025-59287?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-59287?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST