# CVE-2025-49735: Windows KDC Proxy Service (KPSSVC) Remote Code Execution Vulnerability

CVE-2025-49735 is fixed in 13 products on 1 platform, first by KB5061010, released June 10, 2025. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2025-49735
- Priority: Urgent
- CVSS: 8.1 (Critical)
- EPSS: 0.0120
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Jul 8, 2025
- Weakness: Use After Free
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49735

## Description

<p>Use after free in Windows KDC Proxy Service (KPSSVC) 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 |  | [KB5061059](https://patchblox.com/security/data/fix/microsoft/kb5061059.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB5061059](https://patchblox.com/security/data/fix/microsoft/kb5061059.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2012 R2 |  | [KB5061018](https://patchblox.com/security/data/fix/microsoft/kb5061018.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB5061018](https://patchblox.com/security/data/fix/microsoft/kb5061018.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2016 | 14393.8148 | [KB5061010](https://patchblox.com/security/data/fix/microsoft/kb5061010.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.8148 | [KB5061010](https://patchblox.com/security/data/fix/microsoft/kb5061010.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2019 | 17763.7434 | [KB5060531](https://patchblox.com/security/data/fix/microsoft/kb5060531.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.7434 | [KB5060531](https://patchblox.com/security/data/fix/microsoft/kb5060531.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2022 | 20348.3807 | [KB5060526](https://patchblox.com/security/data/fix/microsoft/kb5060526.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.3807 | [KB5060526](https://patchblox.com/security/data/fix/microsoft/kb5060526.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.1665 | [KB5060118](https://patchblox.com/security/data/fix/microsoft/kb5060118.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2025 | 26100.4349 | [KB5060842](https://patchblox.com/security/data/fix/microsoft/kb5060842.md) | Jun 10, 2025 |
| Microsoft | Windows Server 2025 (Server Core installation) | 26100.4349 | [KB5060842](https://patchblox.com/security/data/fix/microsoft/kb5060842.md) | Jun 10, 2025 |

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Data as of 2026-11-08T13:06:02Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

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