9.8
Critical
Exploited
CVE-2025-59287 Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability
Active exploitation observed
· CISA KEV catalogue
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.
Ransomware campaigns
Not observed so far
Weakness
CWE-502
Description
Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.7922 | 10.0.17763.7922 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.7922 | 10.0.17763.7922 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.4297 | 10.0.20348.4297 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.6905 | 10.0.26100.6905 |
| Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 | 10.0.25398.0 → < 10.0.25398.1916 | 10.0.25398.1916 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.6905 | 10.0.26100.6905 |
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.8524 | 10.0.14393.8524 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.8524 | 10.0.14393.8524 |
| Windows Server 2012 6.2 | 6.2.9200.0 → < 6.2.9200.25728 | 6.2.9200.25728 |
Show the 3 other branches Hide the 3 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2012 (Server Core installation) 6.2 | 6.2.9200.0 → < 6.2.9200.25728 | 6.2.9200.25728 |
| Windows Server 2012 R2 6.3 | 6.3.9600.0 → < 6.3.9600.22826 | 6.3.9600.22826 |
| Windows Server 2012 R2 (Server Core installation) 6.3 | 6.3.9600.0 → < 6.3.9600.22826 | 6.3.9600.22826 |
References
- Windows Server Update Service (WSUS) Remote Code Execution Vulnerability msrc.microsoft.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
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