Microsoft Windows
CVE-2019-0785 — Windows DHCP Server Remote Code Execution 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 either run arbitrary code on the DHCP failover server or 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
9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.8
EPSS Score
0.49632
probability of exploitation in the next 30 days
0.98772 percentile - updated 2026-07-25
View on FIRST.org
Affected Products
6 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows Server 2012 4507462 (Monthly Rollup) 4507464 (Security Only) Critical Remote Code Execution 4503285 Base: 9.8 Temporal: 8.8 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4507462 (Monthly Rollup) 4507464 (Security Only) Critical Remote Code Execution 4503285 Base: 9.8 Temporal: 8.8 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4507448 (Monthly Rollup) 4507457 (Security Only) Critical Remote Code Execution 4503276 Base: 9.8 Temporal: 8.8 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4507448 (Monthly Rollup) 4507457 (Security Only) Critical Remote Code Execution 4503276 Base: 9.8 Temporal: 8.8 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2016 | 4507460 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 (Server Core installation) | 4507460 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 | 4507469 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 (Server Core installation) | 4507469 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4507435 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1903 (Server Core installation) | 4507453 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
4507460 |
Security Update | Yes |
4507469 |
Security Update | Yes |
4507435 |
Security Update | Yes |
4507453 |
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 Windows Enterprise Security Team
References
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