CVE-2025-59287
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
| Vendor | microsoft |
| Product | windows server 2012 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Oct 14, 2025 |
| Last Updated | Feb 26, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
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
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Windows Server 2012
6.2.9200.0 < 6.2.9200.25728
Microsoft / Windows Server 2012 (Server Core installation)
6.2.9200.0 < 6.2.9200.25728
Microsoft / Windows Server 2012 R2
6.3.9600.0 < 6.3.9600.22826
Microsoft / Windows Server 2012 R2 (Server Core installation)
6.3.9600.0 < 6.3.9600.22826
Microsoft / Windows Server 2016
10.0.14393.0 < 10.0.14393.8524
Microsoft / Windows Server 2016 (Server Core installation)
10.0.14393.0 < 10.0.14393.8524
Microsoft / Windows Server 2019
10.0.17763.0 < 10.0.17763.7922
Microsoft / Windows Server 2019 (Server Core installation)
10.0.17763.0 < 10.0.17763.7922
Microsoft / Windows Server 2022
10.0.20348.0 < 10.0.20348.4297
Microsoft / Windows Server 2022, 23H2 Edition (Server Core installation)
10.0.25398.0 < 10.0.25398.1916
Microsoft / Windows Server 2025
10.0.26100.0 < 10.0.26100.6905
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.0 < 10.0.26100.6905
References
msrc.microsoft.com: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 gist.github.com: https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 bleepingcomputer.com: https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/ hawktrace.com: https://hawktrace.com/blog/CVE-2025-59287 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