October 24, 2025 · Applied Cybernetics Group
CVE-2025-59287 — Microsoft Windows
Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability
- Added to KEV
2025-10-24- Federal due date
2025-11-14- Vendor
- Microsoft
- Product
- Windows
- EPSS
- 98.8th percentile (score 0.727, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-59287
CISA short description
Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.