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

Category Remote Code Execution

Released Jul 9 2019

Last Updated Jul 9 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.49632 — 0.98746 percentile

CVSS Vector

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

Temporal Score: 8.8

EPSS Score

0.49632

probability of exploitation in the next 30 days

0.98746 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2012	`4507462 (Monthly Rollup) 4507464 (Security Only)`	Critical	Remote Code Execution	Yes
Windows Server 2012 (Server Core installation)	`4507462 (Monthly Rollup) 4507464 (Security Only)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2	`4507448 (Monthly Rollup) 4507457 (Security Only)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2 (Server Core installation)	`4507448 (Monthly Rollup) 4507457 (Security Only)`	Critical	Remote Code Execution	Yes
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

6 patches

Article	Type	Restart
`4507462 (Monthly Rollup) 4507464`	Monthly Rollup	Yes
`4507448 (Monthly Rollup) 4507457`	Monthly Rollup	Yes
`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

MSRC Advisory MITRE NVD