# CVE-2026-62745: Windows DHCP Server Information Disclosure Vulnerability

CVE-2026-62745 is fixed in 12 products on 1 platform, first by KB5120418, released August 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-62745
- Priority: Routine
- CVSS: 6.5 (Important)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 11, 2026
- Weakness: Integer Underflow (Wrap or Wraparound)
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62745

## Description

<p>Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows Server 2012 |  | [KB5120386](https://patchblox.com/security/data/fix/microsoft/kb5120386.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB5120386](https://patchblox.com/security/data/fix/microsoft/kb5120386.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2012 R2 |  | [KB5120385](https://patchblox.com/security/data/fix/microsoft/kb5120385.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB5120385](https://patchblox.com/security/data/fix/microsoft/kb5120385.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2016 | 14393.9418 | [KB5120418](https://patchblox.com/security/data/fix/microsoft/kb5120418.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.9418 | [KB5120418](https://patchblox.com/security/data/fix/microsoft/kb5120418.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2019 | 17763.9121 | [KB5120238](https://patchblox.com/security/data/fix/microsoft/kb5120238.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.9121 | [KB5120238](https://patchblox.com/security/data/fix/microsoft/kb5120238.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2022 | 20348.5440 | [KB5120229](https://patchblox.com/security/data/fix/microsoft/kb5120229.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2022 | 20348.5499 | [KB5120242](https://patchblox.com/security/data/fix/microsoft/kb5120242.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.5440 | [KB5120229](https://patchblox.com/security/data/fix/microsoft/kb5120229.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.5499 | [KB5120242](https://patchblox.com/security/data/fix/microsoft/kb5120242.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2025 | 26100.33222 | [KB5120228](https://patchblox.com/security/data/fix/microsoft/kb5120228.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2025 | 26100.33296 | [KB5120233](https://patchblox.com/security/data/fix/microsoft/kb5120233.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2025 (Server Core installation) | 26100.33222 | [KB5120228](https://patchblox.com/security/data/fix/microsoft/kb5120228.md) | Aug 11, 2026 |
| Microsoft | Windows Server 2025 (Server Core installation) | 26100.33296 | [KB5120233](https://patchblox.com/security/data/fix/microsoft/kb5120233.md) | Aug 11, 2026 |

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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

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