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TI-2025-36863 Aliases CVE-2025-59287GHSA-943j-4893-6rfq

Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

Priority CRITICAL 100Exploited in the wildCWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

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

Why it matters now

Exploitation Active In CISA KEV since 2025-10-24CISA due date 2025-11-14
EPSS 0.9998 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Microsoft: 9 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.257286.2.9200.25728Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.257286.2.9200.25728Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.228266.3.9600.22826Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.228266.3.9600.22826Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.852410.0.14393.8524Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.852410.0.14393.8524Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.792210.0.17763.7922Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.792210.0.17763.7922Patch availableCNA
MicrosoftWindows Server 202210.0.20348.0 to before 10.0.20348.429710.0.20348.4297Patch availableCNA
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to before 10.0.25398.191610.0.25398.1916Patch availableCNA
MicrosoftWindows Server 202510.0.26100.0 to before 10.0.26100.690510.0.26100.6905Patch availableCNA
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to before 10.0.26100.690510.0.26100.6905Patch availableCNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25728 Fixed in 6.2.9200.25728 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.25728 Fixed in 6.2.9200.25728 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22826 Fixed in 6.3.9600.22826 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.22826 Fixed in 6.3.9600.22826 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8524 Fixed in 10.0.14393.8524 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.8524 Fixed in 10.0.14393.8524 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7922 Fixed in 10.0.17763.7922 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.7922 Fixed in 10.0.17763.7922 Patch available CNA
  • Windows Server 2022 VendorMicrosoft Affected 10.0.20348.0 to before 10.0.20348.4297 Fixed in 10.0.20348.4297 Patch available CNA
  • Windows Server 2022, 23H2 Edition (Server Core installation) VendorMicrosoft Affected 10.0.25398.0 to before 10.0.25398.1916 Fixed in 10.0.25398.1916 Patch available CNA
  • Windows Server 2025 VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.6905 Fixed in 10.0.26100.6905 Patch available CNA
  • Windows Server 2025 (Server Core installation) VendorMicrosoft Affected 10.0.26100.0 to before 10.0.26100.6905 Fixed in 10.0.26100.6905 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.8524VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.7922VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*before 10.0.20348.4297VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*before 10.0.25398.1916VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*before 10.0.26100.6905VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.8524 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.7922 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.4297 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:* Versions before 10.0.25398.1916 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* Versions before 10.0.26100.6905 Vulnerable ·Microsoft

Remediation

Microsoft 9 updates

  • KB5070893
    Standalone Security Update
    • Windows Server 2025 10.0.26100.6905
    • Windows Server 2025 (Server Core installation) 10.0.26100.6905
  • KB5070892
    Standalone Security Update
    • Windows Server 2022 10.0.20348.4297
    • Windows Server 2022 (Server Core installation) 10.0.20348.4297
  • KB5070887
    Security Update
    • Windows Server 2012 6.2.9200.25728
    • Windows Server 2012 (Server Core installation) 6.2.9200.25728
Show 6 more Microsoft updates
  • KB5070886
    Security Update
    • Windows Server 2012 R2 6.3.9600.22826
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.22826
  • KB5070884
    Security Update
    • Windows Server 2022 10.0.20348.4297
    • Windows Server 2022 (Server Core installation) 10.0.20348.4297
  • KB5070883
    Security Update
    • Windows Server 2019 10.0.17763.7922
    • Windows Server 2019 (Server Core installation) 10.0.17763.7922
  • KB5070882
    Security Update
    • Windows Server 2016 10.0.14393.8524
    • Windows Server 2016 (Server Core installation) 10.0.14393.8524
  • KB5070881
    Security Update
    • Windows Server 2025 10.0.26100.6905
    • Windows Server 2025 (Server Core installation) 10.0.26100.6905
  • KB5070879
    Security Update
    • Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1916

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation More Likely

Timeline

  1. 2025-10-24 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2025-59287
  3. 2026-10-03 Alias added: GHSA-943j-4893-6rfq

References

Exploit 1

Patch 1

Advisory 4

  • TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-01310 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 10.0
  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-01465 HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01009 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 9.0
  • TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
See all 5293 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences