CVE-2025-59287

critical

Description

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

References

https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service

https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-service

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287

https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951

https://www.bleepingcomputer.com/news/microsoft/microsoft-patch-for-wsus-flaw-disabled-windows-server-hotpatching/

https://thehackernews.com/2025/10/cisa-and-nsa-issue-urgent-guidance-to.html

https://hackread.com/hackers-exploit-wsus-skuld-stealer-microsoft-patch/

https://arstechnica.com/security/2025/10/two-windows-vulnerabilities-one-a-0-day-are-under-active-exploitation/

https://www.darktrace.com/blog/wsus-exploited-darktraces-analysis-of-post-exploitation-activities-related-to-cve-2025-59287

https://www.infosecurity-magazine.com/news/actively-exploited-wsus-bug-cisa/

https://www.theregister.com/2025/10/27/microsoft_wsus_attacks_multiple_orgs/

https://unit42.paloaltonetworks.com/microsoft-cve-2025-59287/

https://therecord.media/wsus-vulnerability-cisa-late-friday-warning

https://cyberscoop.com/microsoft-windows-server-update-services-vulnerability-exploited-attacks/

https://www.huntress.com/blog/exploitation-of-windows-server-update-services-remote-code-execution-vulnerability

https://www.darkreading.com/vulnerabilities-threats/microsoft-emergency-patch-windows-server-bug

https://www.cisa.gov/news-events/alerts/2025/10/24/microsoft-releases-out-band-security-update-mitigate-windows-server-update-service-vulnerability-cve

https://www.cisa.gov/news-events/alerts/2025/10/24/cisa-adds-two-known-exploited-vulnerabilities-catalog

https://securityaffairs.com/183815/security/u-s-cisa-adds-microsoft-wsus-and-adobe-commerce-and-magento-open-source-flaws-to-its-known-exploited-vulnerabilities-catalog.html

https://latesthackingnews.com/2025/10/28/microsoft-october-patch-tuesday-is-huge-with-170-fixes/

https://www.theregister.com/2025/10/24/windows_server_patch/

https://www.helpnetsecurity.com/2025/10/15/microsoft-patch-tuesday-zero-days-cve-2025-24990-cve-2025-59230-cve-2025-47827/

https://thehackernews.com/2025/10/two-new-windows-zero-days-exploited-in.html

https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/

Details

Source: Mitre, NVD

Published: 2025-10-14

Updated: 2025-11-12

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.56158

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest