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CVE-2025-59287Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
9.8 CRITICALEPSS 99.98%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.8 | CRITICAL | 3.1microsoft (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 9.8 | CRITICAL | 3.1microsoft (CNA) | 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 |
CISA required action
⚡ Known exploited · remediation due Nov 14, 2025
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2025-59287
- Status
- Analyzed
- Assigner (CNA)
- microsoft
- Published
- Oct 14, 2025
- Last modified
- 2026-06-17 09:45 UTC
- Weaknesses
- CWE-502 · Deserialization of Untrusted Data
Affected Products
As published by the CNA in the CVE record.
MicrosoftWindows Server 20121 version range
- 6.2.9200.0 before 6.2.9200.25728
MicrosoftWindows Server 2012 (Server Core installation)1 version range
- 6.2.9200.0 before 6.2.9200.25728
MicrosoftWindows Server 2012 R21 version range
- 6.3.9600.0 before 6.3.9600.22826
MicrosoftWindows Server 2012 R2 (Server Core installation)1 version range
- 6.3.9600.0 before 6.3.9600.22826
MicrosoftWindows Server 20161 version range
- 10.0.14393.0 before 10.0.14393.8524
MicrosoftWindows Server 2016 (Server Core installation)1 version range
- 10.0.14393.0 before 10.0.14393.8524
MicrosoftWindows Server 20191 version range
- 10.0.17763.0 before 10.0.17763.7922
MicrosoftWindows Server 2019 (Server Core installation)1 version range
- 10.0.17763.0 before 10.0.17763.7922
MicrosoftWindows Server 20221 version range
- 10.0.20348.0 before 10.0.20348.4297
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)1 version range
- 10.0.25398.0 before 10.0.25398.1916
MicrosoftWindows Server 20251 version range
- 10.0.26100.0 before 10.0.26100.6905
MicrosoftWindows Server 2025 (Server Core installation)1 version range
- 10.0.26100.0 before 10.0.26100.6905
References
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287
- hawktrace.com https://hawktrace.com/blog/CVE-2025-59287
- bleepingcomputer.com https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/
- vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-service
- vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service
- gist.github.com https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287