# KB5070879: October 2025 cumulative update for Windows Server 23H2

KB5070879, released October 23, 2025, fixes 1 CVE in Windows Server 2022, 23H2 Edition (Server Core installation) (build 25398.1916). One of them is being exploited (CVE-2025-59287); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb5070879
- Platform: Microsoft
- Released: Oct 23, 2025
- Priority: Patch now (Closes CVE-2025-59287, exploited (CISA KEV))
- CVEs: 1, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/5070879

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows Server 2022, 23H2 Edition (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2022-23h2-edition-server-core-installation.md) |  | 25398.1916 |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-59287](https://patchblox.com/security/data/cve/CVE-2025-59287.md) | Patch now | Windows Server Update Service | 9.8 | 0.9998 | CISA KEV |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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