9.8

CVE-2025-59287

Warning
Media report
Exploit
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
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Data is provided by the National Vulnerability Database (NVD)
Microsoft ≫ Windows Server 2016 Version < 10.0.14393.8524
Microsoft ≫ Windows Server 2019 Version < 10.0.17763.7922
Microsoft ≫ Windows Server 2022 Version < 10.0.20348.4297
Microsoft ≫ Windows Server 2022 23h2 Version < 10.0.25398.1916
Microsoft ≫ Windows Server 2025 Version < 10.0.26100.6905

24.10.2025: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability

Vulnerability

Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution.

Description

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 56.16% 0.98
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
secure@microsoft.com 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-502 Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

https://hawktrace.com/blog/CVE-2025-59287
Third Party Advisory
Exploit