Which products and versions are affected by CVE-2025-59287?

Affected: Windows Server 2012 (Microsoft) versions r2, >= 6.2.9200.0; Windows Server 2016 (Microsoft) versions >= 10.0.14393.0; Windows Server 2019 (Microsoft) versions >= 10.0.17763.0, among others. The full list is in the CVE brief.

Is CVE-2025-59287 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 24, 2025 and is known to be used in ransomware campaigns.

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

Yes. It was added on Oct 24, 2025 with a federal remediation due date of Nov 14, 2025.

Is there a public exploit for CVE-2025-59287?

Public exploit code is available.

How urgently should CVE-2025-59287 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2025-59287

CriticalExploitedPublic exploit

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

Published Oct 15, 2025 · Updated Feb 26, 2026

Key Facts

Patch immediately

CVE-2025-59287 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Windows Server 2012 (Microsoft), Windows Server 2016 (Microsoft), Windows Server 2019 (Microsoft) and 10 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 24, 2025 and is known to be used in ransomware campaigns. Public exploit code is available.
EPSS estimates a 100% probability of exploitation in the next 30 days.
Fixed versions are available, including Windows Server 2016 10.0.14393.8524, Windows Server 2019 10.0.17763.7922, Windows Server 2022 10.0.20348.4297.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

100%

Higher than 99.9% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings, used by ransomware

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2025-59287 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Oct 24, 2025	Nov 14, 2025	Not reported
Industry KEV feed	Oct 24, 2025	Nov 14, 2025	Known
CIRCL KEV	Oct 24, 2025	Nov 14, 2025	Not reported
ENISA EUVD	Oct 24, 2025	n/a	Not reported

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.

Affected Products

19 affected entries in total

Product	Affected versions	Fixed in
Windows Server 2012Microsoft	r2, >= 6.2.9200.0	6.2.9200.25728
Windows Server 2016Microsoft	>= 10.0.14393.0	10.0.14393.8524
Windows Server 2019Microsoft	>= 10.0.17763.0	10.0.17763.7922
Windows Server 2022Microsoft	>= 10.0.20348.0	10.0.20348.4297
Windows Server 2022 23h2Microsoft	See advisory	10.0.25398.1916

8 more affected products in the full CVE brief

Patched Releases

Windows Server 2016

10.0.14393.8524

Windows Server 2019

10.0.17763.7922

Windows Server 2022

10.0.20348.4297

Windows Server 2022 23h2

10.0.25398.1916

Windows Server 2025

10.0.26100.6905

Windows Server 2012

6.2.9200.25728

Windows Server 2012 (Server Core installation)

6.2.9200.25728

Windows Server 2012 R2

6.3.9600.22826

Windows Server 2012 R2 (Server Core installation)

6.3.9600.22826

Windows Server 2016 (Server Core installation)

10.0.14393.8524

Windows Server 2019 (Server Core installation)

10.0.17763.7922

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

10.0.25398.1916

Windows Server 2025 (Server Core installation)

10.0.26100.6905

Timeline

Publicly disclosed
Oct 15, 2025
Added to CISA KEV
Oct 24, 2025
Added to Industry KEV feed
Oct 24, 2025
Added to CIRCL KEV
Oct 24, 2025
Added to ENISA EUVD
Oct 24, 2025
Last updated
Feb 26, 2026

Weakness Type

CWE-502 Deserialization of Untrusted Data

References

15 more references in the full CVE brief

FAQ

Common Questions.

Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Affected: Windows Server 2012 (Microsoft) versions r2, >= 6.2.9200.0; Windows Server 2016 (Microsoft) versions >= 10.0.14393.0; Windows Server 2019 (Microsoft) versions >= 10.0.17763.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 24, 2025 and is known to be used in ransomware campaigns.
Yes. It was added on Oct 24, 2025 with a federal remediation due date of Nov 14, 2025.
Public exploit code is available.
Fixed versions are available, including Windows Server 2016 10.0.14393.8524, Windows Server 2019 10.0.17763.7922, Windows Server 2022 10.0.20348.4297.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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