# CVE-2019-1206: Windows DHCP Server Denial of Service Vulnerability

CVE-2019-1206 is fixed in 10 products on 1 platform, first by KB4512517, released August 13, 2019. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2019-1206
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0530
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 13, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1206

## Description

<p>A memory corruption vulnerability exists in the Windows Server DHCP service when an attacker sends specially crafted packets to a DHCP failover server. An attacker who successfully exploited the vulnerability could cause the DHCP service to become nonresponsive.</p> <p>To exploit the vulnerability, an attacker could send a specially crafted packet to a DHCP server. However, the DHCP server must be set to failover mode for the attack to succeed.</p> <p>The security update addresses the vulnerability by correcting how DHCP failover servers handle network packets.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows Server 2012 |  | [KB4512482](https://patchblox.com/security/data/fix/microsoft/kb4512482.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 |  | [KB4512518](https://patchblox.com/security/data/fix/microsoft/kb4512518.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4512482](https://patchblox.com/security/data/fix/microsoft/kb4512482.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4512518](https://patchblox.com/security/data/fix/microsoft/kb4512518.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 R2 |  | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 R2 |  | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4512488](https://patchblox.com/security/data/fix/microsoft/kb4512488.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4512489](https://patchblox.com/security/data/fix/microsoft/kb4512489.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2016 | 14393.3144 | [KB4512517](https://patchblox.com/security/data/fix/microsoft/kb4512517.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.3144 | [KB4512517](https://patchblox.com/security/data/fix/microsoft/kb4512517.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2019 | 17763.678 | [KB4511553](https://patchblox.com/security/data/fix/microsoft/kb4511553.md) | Aug 13, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.678 | [KB4511553](https://patchblox.com/security/data/fix/microsoft/kb4511553.md) | Aug 13, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.950 | [KB4512501](https://patchblox.com/security/data/fix/microsoft/kb4512501.md) | Aug 13, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.295 | [KB4512508](https://patchblox.com/security/data/fix/microsoft/kb4512508.md) | Aug 13, 2019 |

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Data as of 2026-11-07T18:46:35Z 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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