Is CVE-2025-59287 in the CISA KEV catalog?

Yes. CVE-2025-59287 is on the CISA Known Exploited Vulnerabilities list, added 2025-10-24.

What is the CVSS severity of CVE-2025-59287?

CVE-2025-59287 has a CVSS v3 base score of 9.8 (Critical).

What is the EPSS score for CVE-2025-59287?

CVE-2025-59287 has an EPSS score of 99.96% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-59287?

Install KB5070887 for Windows Server 2012. Fixes are available for 13 affected products.

CVE & CISA-KEV Catalog

CVE-2025-59287

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

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

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

Windows Server 2012Windows

Install:KB5070887Microsoft

Windows Server 2012 (Server Core installation)Windows

Install:KB5070887Microsoft

Windows Server 2012 R2Windows

Install:KB5070886Microsoft

Windows Server 2012 R2 (Server Core installation)Windows

Install:KB5070886Microsoft

Windows Server 2016Windows

Install:KB5070882Microsoft

Windows Server 2016 (Server Core installation)Windows

Install:KB5070882Microsoft

Windows Server 2019Windows

Install:KB5070883Microsoft

Windows Server 2019 (Server Core installation)Windows

Install:KB5070883Microsoft

Windows Server 2022Windows

Install:KB5070892

Install:KB5070884Microsoft

Windows Server 2022 (Server Core installation)Windows

Install:KB5070884Microsoft

Install:KB5070892

Windows Server 2022, 23H2 Edition (Server Core installation)Windows

Install:KB5070879Microsoft

Windows Server 2025Windows

Install:KB5070893

Install:KB5070881Microsoft

Windows Server 2025 (Server Core installation)Windows

Install:KB5070881Microsoft

Install:KB5070893

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Exploit Intelligence

99.96%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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

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

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

Remediation due: 2025-11-14

References

Exploit1

hawktrace.com

Vendor Advisory1

msrc.microsoft.com

Mitigation1

vicarius.io

Third-Party Advisory3

Press / Media1

bleepingcomputer.com

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41082	High	8.0	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-12.