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Findings

CVE-2025-59287

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

Published Oct 14, 2025 · updated Jun 17, 2026 · Microsoft Windows

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

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2025 · Catalog

    Detected

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

  2. Oct 24, 2025 · CISA KEV

    Known exploited

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

  3. Nov 14, 2025 · CISA KEV

    Remediation due

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

  4. Jun 17, 2026 · Catalog

    Updated

    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.

CISA due date Nov 14, 2025

Affected

  • cpe microsoft/windows server 2012version unspecified
  • cpe microsoft/windows server 2012r2
  • cpe microsoft/windows server 2016version unspecified
  • cpe microsoft/windows server 2019version unspecified
  • cpe microsoft/windows server 2022version unspecified
  • cpe microsoft/windows server 2022 23h2version unspecified
  • cpe microsoft/windows server 2025version unspecified
  • vendor Microsoft Windowsversion unspecified

Sources

  • CISA KEVCVE-2025-59287

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

    cisa.gov
  • CVE.orgCVE-2025-59287

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2025-59287

    30-day exploitation probability 100.0%

    first.org
  • Metasploit Modulesexploit_windows/http/wsus_deserialization_rce

    Public module reference (great). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDCVE-2025-59287

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

    nvd.nist.gov

References