Deserialization in Microsoft Windows Server 2012
CVE-2025-59287
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 1.000 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Microsoft Windows Server 2012 — versions 6.2.9200.0
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2012 R2 — versions 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core Installation) — versions 6.3.9600.0
- Microsoft Windows Server 2012 (Server Core Installation) — versions 6.2.9200.0
- Microsoft Windows Server 2016 — versions 10.0.14393.0
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
- Microsoft Windows Server 2019 — versions 10.0.17763.0
- Microsoft Windows Server 2019
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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 proof-of-concept exploits
- jiansiting/CVE-2025-59287
- mubix/Find-WSUS
- Lupovis/Honeypot-for-CVE-2025-59287-WSUS
- tecxx/CVE-2025-59287-WSUS
- garvitv14/CVE-2025-59287
- M507/CVE-2025-59287-PoC
- QurtiDev/WSUS-CVE-2025-59287-RCE
- AdityaBhatt3010/CVE-2025-59287-When-your-patch-server-becomes-the-attack-vector
- 0x7556/CVE-2025-59287
- mrk336/Breaking-the-Update-Chain-Inside-CVE-2025-59287-and-the-WSUS-RCE-Threat
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287 (vendor-advisory, patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Press/Media Coverage)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mitigation, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory, US Government Resource)
Frequently asked questions
- What is CVE-2025-59287?
- CVE-2025-59287 is a critical-severity vulnerability in Microsoft Windows Server 2012, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2025-10-14.
- How severe is CVE-2025-59287?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-59287 known to be exploited?
- Yes. CVE-2025-59287 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-10-24), indicating it is being actively exploited. 28 public proof-of-concept repositories are indexed.