# KB5049994: January 2025 security update

KB5049994, released January 14, 2025, fixes 7 CVEs across 10 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/microsoft/kb5049994
- Platform: Microsoft
- Released: Jan 14, 2025
- Priority: Urgent (Closes CVE-2025-21269, exploitation more likely)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/5049994

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/windows-server-2008-r2-for-x64-based-systems-service-pack-1.md) |  |  |
| [Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-r2-for-x64-based-systems-service-pack-1-server-core-installation.md) |  |  |
| [Windows Server 2008 for 32-bit Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-32-bit-systems-service-pack-2-server-core-installation.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2.md) |  |  |
| [Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-for-x64-based-systems-service-pack-2-server-core-installation.md) |  |  |
| [Windows Server 2012](https://patchblox.com/security/data/product/microsoft/windows-server-2012.md) |  |  |
| [Windows Server 2012 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2012-server-core-installation.md) |  |  |
| [Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2.md) |  |  |
| [Windows Server 2012 R2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-21269](https://patchblox.com/security/data/cve/CVE-2025-21269.md) | Urgent | Windows MapUrlToZone | 4.3 | 0.0450 | More likely |
| [CVE-2025-21189](https://patchblox.com/security/data/cve/CVE-2025-21189.md) | Urgent | Windows MapUrlToZone | 4.3 | 0.0291 | More likely |
| [CVE-2025-21268](https://patchblox.com/security/data/cve/CVE-2025-21268.md) | Urgent | Windows MapUrlToZone | 4.3 | 0.0195 | More likely |
| [CVE-2025-21328](https://patchblox.com/security/data/cve/CVE-2025-21328.md) | Urgent | Windows MapUrlToZone | 4.3 | 0.0149 | More likely |
| [CVE-2025-21329](https://patchblox.com/security/data/cve/CVE-2025-21329.md) | Urgent | Windows MapUrlToZone | 4.3 | 0.0149 | More likely |
| [CVE-2025-21276](https://patchblox.com/security/data/cve/CVE-2025-21276.md) | High | Windows MapUrlToZone | 7.5 | 0.0246 |  |
| [CVE-2025-21332](https://patchblox.com/security/data/cve/CVE-2025-21332.md) | Routine | Windows MapUrlToZone | 4.3 | 0.0150 |  |

---

Data as of 2026-11-07T06:34:28Z 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