Windows DHCP Server
CVE-2019-1206 — Windows DHCP Server Denial of Service Vulnerability
Executive Summary
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. 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. The security update addresses the vulnerability by correcting how DHCP failover servers handle network packets.
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 6.7
EPSS Score
0.05297
probability of exploitation in the next 30 days
0.91525 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
10 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows Server 2012 | 4512518 (Monthly Rollup) 4512482 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2012 (Server Core installation) | 4512518 (Monthly Rollup) 4512482 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2012 R2 | 4512488 (Monthly Rollup) 4512489 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2012 R2 (Server Core installation) | 4512488 (Monthly Rollup) 4512489 (Security Only) |
Important | Denial of Service | Yes |
| Windows Server 2016 | 4512517 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2016 (Server Core installation) | 4512517 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2019 | 4511553 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server 2019 (Server Core installation) | 4511553 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4512501 (Security Update) |
Important | Denial of Service | Yes |
| Windows Server, version 1903 (Server Core installation) | 4512508 (Security Update) |
Important | Denial of Service | Yes |
Patches
6 patches
| Article | Type | Restart |
|---|---|---|
4512518 (Monthly Rollup) 4512482 |
Monthly Rollup | Yes |
4512488 (Monthly Rollup) 4512489 |
Monthly Rollup | Yes |
4512517 |
Security Update | Yes |
4511553 |
Security Update | Yes |
4512501 |
Security Update | Yes |
4512508 |
Security Update | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Microsoft Platform Security Assurance & Vulnerability Research
References
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