CVE-2025-59287 (GCVE-0-2025-59287)

Vulnerability from cvelistv5 – Published: 2025-10-14 17:01 – Updated: 2026-02-26 16:58
VLAI CISA Previdian
Title
Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-25 03:56 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Impacted products
Vendor Product Version
Microsoft Windows Server 2012 Affected: 6.2.9200.0 , < 6.2.9200.25728 (custom)
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Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.9200.0 , < 6.2.9200.25728 (custom)
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Microsoft Windows Server 2012 R2 Affected: 6.3.9600.0 , < 6.3.9600.22826 (custom)
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Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.9600.0 , < 6.3.9600.22826 (custom)
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Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.8524 (custom)
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Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.8524 (custom)
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Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.7922 (custom)
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Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.7922 (custom)
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Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.4297 (custom)
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Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Affected: 10.0.25398.0 , < 10.0.25398.1916 (custom)
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Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.6905 (custom)
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Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.6905 (custom)
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Date Public
2025-10-14 14:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-59287

Status: Confirmed

Status Updated: 2025-10-24 02:00 CEST

Exploited: Yes


Timestamps
First Seen: 2025-10-24
Asserted: 2025-10-24

Scope
Notes: Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution. | 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. | Due date: 2025-11-14 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-59287 ; https://nvd.nist.gov/vuln/detail/CVE-2025-59287

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-502
Feed CISA Known Exploited Vulnerabilities Catalog
Product Windows
Due Date 2025-11-14
Date Added 2025-10-24
Vendorproject Microsoft
Vulnerabilityname Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability
Knownransomwarecampaignuse Unknown

References

Created: 2026-10-02 08:09 CEST | Updated: 2026-10-02 08:09 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2025-59287

Status: Confirmed

Status Updated: 2026-06-01 12:42 CEST

Exploited: Yes


Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01

Scope
Notes: Windows Server Update Service (WSUS) Remote Code Execution Vulnerability | Affected: Microsoft / Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation) | CVSS: 9.8 (CRITICAL) | EPSS: 0.9998 | Used in malware: unknown | Listed 1 day ahead of CISA KEV | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian


Details
Feed Previdian (previdian.com)
Title Windows Server Update Service (WSUS) Remote Code Execution Vulnerability
Cve Id CVE-2025-59287
Vendor Microsoft
Ghsa Id None
Product Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Added Date 2026-06-01T10:42:54.681Z
Cvss Score 9.8
Epss Score 0.9998
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.99981
Used In Malware unknown
Vulnerability Id CVE-2025-59287
Ahead Of Cisa Kev
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False

References

Created: 2026-10-02 09:10 CEST | Updated: 2026-10-02 09:10 CEST
Show details on NVD website

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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