CVE-2025-59287 | Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

Exp

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

Published: 2025-10-14 Last update: 2025-11-12 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-59287 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 72.70%, 99th percentile). CISA KEV confirms active exploitation (added 2025-10-24) affecting Microsoft / Windows. a weakness (CWE-502) Unauthenticated remote administrative access may be possible. EPSS rose +3.63% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-59287

Name: Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability · CISA KEV detail

Exploit added: 2025-10-24

Action due: 2025-11-14

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.

Public exploit references (Exploit-DB) for CVE-2025-59287

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-59287

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-02 69.07% 72.70% +3.63%
2 2026-05-29 66.57% 69.07% +2.50%
3 2026-05-26 — 66.57% —

Full EPSS history (67 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-59287

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2025-59287

Affected software / configurations for CVE-2025-59287

Vendor Product Version Raw CPE
microsoft windows_server_2012 — cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
microsoft windows_server_2012 r2 cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
microsoft windows_server_2016 < 10.0.14393.8524 cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
microsoft windows_server_2019 < 10.0.17763.7922 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoft windows_server_2022 < 10.0.20348.4297 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
microsoft windows_server_2022_23h2 < 10.0.25398.1916 cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
microsoft windows_server_2025 < 10.0.26100.6905 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

References for CVE-2025-59287

URL Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 Vendor Advisory
https://hawktrace.com/blog/CVE-2025-59287 Exploit 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-service Third Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-59287-mitigation-script-rce-vulnerability-in-windows-server-update-service Mitigation Third Party Advisory
https://gist.github.com/hawktrace/880b54fb9c07ddb028baaae401bd3951 Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59287 Third Party Advisory US Government Resource
cvelogic Threat Intelligence