CVE-2025-59287: Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability

Published Oct 14, 2025
·
Updated

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

Other sources

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

— CISA

Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

— Microsoft

Affected Software

21 affected componentsFixes available
Microsoft Windows
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016<10.0.14393.8524
Microsoft Windows Server 2019<10.0.17763.7922
Microsoft Windows Server 2022<10.0.20348.4297
Microsoft Windows Server 2022 23h2<10.0.25398.1916
Microsoft Windows Server 2025<10.0.26100.6905
Microsoft Windows Server 2012 R2<6.3.9600.22826
6.3.9600.22826
Microsoft Windows Server 2012 R2<6.3.9600.22826
6.3.9600.22826
Microsoft Windows Server 2012<6.2.9200.25728
6.2.9200.25728
Microsoft Windows Server 2016<10.0.14393.8524
10.0.14393.8524
Microsoft Windows Server 2025<10.0.26100.6905
10.0.26100.6905
Microsoft Windows Server 2016<10.0.14393.8524
10.0.14393.8524
Microsoft Windows Server 2012<6.2.9200.25728
6.2.9200.25728
Microsoft Windows Server 2025<10.0.26100.6905
10.0.26100.6905
Microsoft Windows Server 2022<10.0.20348.4297
10.0.20348.4297
Microsoft Windows Server 2022, 23H2 Edition<10.0.25398.1916
10.0.25398.1916
Microsoft Windows Server 2022<10.0.20348.4297
10.0.20348.4297
Microsoft Windows Server 2019<10.0.17763.7922
10.0.17763.7922
Microsoft Windows Server 2019<10.0.17763.7922
10.0.17763.7922

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.3.9600.22826Patch KB5070886
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.2.9200.25728Patch KB5070887
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.14393.8524Patch KB5070882
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.26100.6905Patch KB5070893
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.20348.4297Patch KB5070892
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.25398.1916Patch KB5070879
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.17763.7922Patch KB5070883

Event History

Oct 14, 2025
CVE Published
via Microsoft·07:00 AM
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:01 PM
Data Sourced
via MITRE·05:01 PM
DescriptionSeverity
Data Sourced
via NVD·05:16 PM
DescriptionSeverityWeaknessAffected Software
Oct 24, 2025
Known Exploited
via CISA·12:00 AM
Data Sourced
via CISA·12:00 AM
RemedyDescriptionAffected Software
News Published
via BleepingComputer·07:27 AM
News Published
via BleepingComputer·07:29 AM
News Published
via The Register·12:16 PM
News Published
via The Register·12:22 PM
News Published
via BleepingComputer·04:28 PM
Oct 27, 2025
News Published
via BleepingComputer·01:27 PM
News Published
via The Register·11:54 PM
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Frequently Asked Questions

1

What is the severity of CVE-2025-59287?

CVE-2025-59287 is classified as a critical Remote Code Execution vulnerability.

2

How do I fix CVE-2025-59287?

The recommended fix for CVE-2025-59287 is to apply the latest security patches provided by Microsoft for affected Windows Server versions.

3

Which Windows Server versions are affected by CVE-2025-59287?

CVE-2025-59287 affects multiple Windows Server versions including 2012, 2016, 2019, 2022, and 2025.

4

What are the potential impacts of CVE-2025-59287?

Exploiting CVE-2025-59287 can allow an unauthorized attacker to execute arbitrary code on affected systems.

5

Is there a user-friendly way to identify if my system is impacted by CVE-2025-59287?

Users can check their system's update history to see if they have installed the necessary security updates addressing CVE-2025-59287.

Company

Resources

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