Vulnerability details
CVE-2025-59287
Actively exploited
Microsoft Windows Server
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
CVSS 3.1
9.8Critical
Remedy
Required action (CISA): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due: 2025-11-14)
Versions not listed as affected in the CVE record:
- Windows Server 2012 — version 6.2.9200.25728 and later
- Windows Server 2012 (Server Core installation) — version 6.2.9200.25728 and later
- Windows Server 2012 R2 — version 6.3.9600.22826 and later
- Windows Server 2012 R2 (Server Core installation) — version 6.3.9600.22826 and later
- Windows Server 2016 — version 10.0.14393.8524 and later
- Windows Server 2016 (Server Core installation) — version 10.0.14393.8524 and later
Official description
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (microsoft) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Microsoft | Windows Server 2012 | 6.2.9200.0 ≤ v < 6.2.9200.25728 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 ≤ v < 6.2.9200.25728 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 ≤ v < 6.3.9600.22826 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 ≤ v < 6.3.9600.22826 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 ≤ v < 10.0.14393.8524 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 ≤ v < 10.0.14393.8524 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 ≤ v < 10.0.17763.7922 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 ≤ v < 10.0.17763.7922 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 ≤ v < 10.0.20348.4297 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 ≤ v < 10.0.25398.1916 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2025 | 10.0.26100.0 ≤ v < 10.0.26100.6905 | CVEProject cvelistV5 (CNA) |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 ≤ v < 10.0.26100.6905 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 vendor-advisorypatch
- https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 exploit
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 government-resource
- https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/
- https://hawktrace.com/blog/CVE-2025-59287
- https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-service
- https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service
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Details
- Published
- 2025-10-14
- Last updated
- 2026-02-26
- State
- Published
- Assigner (CNA)
- microsoft
- Kolun priority
- 100 · Critical
CISA KEV catalog
- Date added
- 2025-10-24
- Due date
- 2025-11-14
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
99.98%
Probability of exploitation in 30 days
99.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-502Deserialization of Untrusted Data