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Critical 9.8Known exploited (CISA KEV)Published Oct 14, 2025
CVE-2025-59287Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
Updated under an hour ago ()
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It affects Microsoft Windows Server 2012 and 6 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 24, 2025; federal agencies had to remediate by Nov 14, 2025. Treat that date as your deadline.
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Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
- CVSS
- 9.8 CRITICAL (v3.1, 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
- Weakness (CWE)
- CWE-502
- Known exploited
- Added to CISA KEV Oct 24, 2025; federal remediation due Nov 14, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 99.98% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Feb 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows Server 2012 microsoft:windows_server_2012 (from the name) | from 6.2.9200.0 before 6.2.9200.25728 | CNA record |
Microsoft Windows Server 2012 R2 microsoft:windows_server_2012_r2 (from the name) | from 6.3.9600.0 before 6.3.9600.22826 | CNA record |
Microsoft Windows Server 2016 microsoft:windows_server_2016 (from the name) | from 10.0.14393.0 before 10.0.14393.8524 | CNA record |
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name) | from 10.0.17763.0 before 10.0.17763.7922 | CNA record |
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name) | from 10.0.20348.0 before 10.0.20348.4297 | CNA record |
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) microsoft:windows_server_2022_23h2 | from 10.0.25398.0 before 10.0.25398.1916 | CNA record |
Microsoft Windows Server 2025 microsoft:windows_server_2025 (from the name) | from 10.0.26100.0 before 10.0.26100.6905 | CNA record |
microsoft windows_server_2012 microsoft:windows_server_2012 | all versions; r2 | NVD |
microsoft windows_server_2016 microsoft:windows_server_2016 | before 10.0.14393.8524 | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | before 10.0.17763.7922 | NVD |
microsoft windows_server_2022 microsoft:windows_server_2022 | before 10.0.20348.4297 | NVD |
microsoft windows_server_2022_23h2 microsoft:windows_server_2022_23h2 | before 10.0.25398.1916 | NVD |
microsoft windows_server_2025 microsoft:windows_server_2025 | before 10.0.26100.6905 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287vendor-advisory, patch
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.