# CVE-2025-59287: Windows Server Update Service (WSUS) Remote Code Execution Vulnerability

CVE-2025-59287 is fixed in 13 products on 1 platform, first by KB5070882, released October 23, 2025. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on October 24, 2025. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2025-59287
- Priority: Patch now
- CVSS: 9.8 (Critical)
- EPSS: 0.9998
- CISA KEV: listed Oct 24, 2025, federal due date Nov 14, 2025
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Oct 23, 2025
- Weakness: Deserialization of Untrusted Data
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59287

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows Server 2012 |  | [KB5070887](https://patchblox.com/security/data/fix/microsoft/kb5070887.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB5070887](https://patchblox.com/security/data/fix/microsoft/kb5070887.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2012 R2 |  | [KB5070886](https://patchblox.com/security/data/fix/microsoft/kb5070886.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB5070886](https://patchblox.com/security/data/fix/microsoft/kb5070886.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2016 | 14393.8524 | [KB5070882](https://patchblox.com/security/data/fix/microsoft/kb5070882.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.8524 | [KB5070882](https://patchblox.com/security/data/fix/microsoft/kb5070882.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2019 | 17763.7922 | [KB5070883](https://patchblox.com/security/data/fix/microsoft/kb5070883.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.7922 | [KB5070883](https://patchblox.com/security/data/fix/microsoft/kb5070883.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2022 |  | [KB5070892](https://patchblox.com/security/data/fix/microsoft/kb5070892.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2022 | 20348.4297 | [KB5070884](https://patchblox.com/security/data/fix/microsoft/kb5070884.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2022 (Server Core installation) |  | [KB5070892](https://patchblox.com/security/data/fix/microsoft/kb5070892.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.4297 | [KB5070884](https://patchblox.com/security/data/fix/microsoft/kb5070884.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.1916 | [KB5070879](https://patchblox.com/security/data/fix/microsoft/kb5070879.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2025 |  | [KB5070893](https://patchblox.com/security/data/fix/microsoft/kb5070893.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2025 | 26100.6905 | [KB5070881](https://patchblox.com/security/data/fix/microsoft/kb5070881.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2025 (Server Core installation) |  | [KB5070893](https://patchblox.com/security/data/fix/microsoft/kb5070893.md) | Oct 23, 2025 |
| Microsoft | Windows Server 2025 (Server Core installation) | 26100.6905 | [KB5070881](https://patchblox.com/security/data/fix/microsoft/kb5070881.md) | Oct 23, 2025 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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