CVE-2025-59287

CRITICAL CISA KEV EPSS 100.0%
Published Oct 14, 20258mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Oct 14, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Oct 24, 2025 8mo ago
KEV Due Nov 14, 2025 228d overdue

Description

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 228d
Added
Oct 24, 2025
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.

EPSS Exploit Probability
100.0% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-502 Deserialization of Untrusted Data Validation

Affected Products 7

VendorProductVersionRange
microsoftwindows_server_2012*any
microsoftwindows_server_2012r2any
microsoftwindows_server_2016* <10.0.14393.8524
microsoftwindows_server_2019* <10.0.17763.7922
microsoftwindows_server_2022* <10.0.20348.4297
microsoftwindows_server_2022_23h2* <10.0.25398.1916
microsoftwindows_server_2025* <10.0.26100.6905

References 7

  • gist.github.com https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951
    Third Party Advisory
  • hawktrace.com https://hawktrace.com/blog/CVE-2025-59287
    ExploitThird Party Advisory
  • msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287
    Vendor Advisory
  • bleepingcomputer.com https://www.bleepingcomputer.com/news/security/cisa-orders-feds-to-patch-windows-server-wsus-flaw-exploited-in-attacks/
    Press/Media Coverage
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287
    Third Party AdvisoryUS Government Resource
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-59287-detection-script-rce-vulnerability-in-windows-server-update-service
    Third Party Advisory
  • vicarius.io https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service
    MitigationThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.