CVE-2026-70066: Windows DHCP Server Elevation of Privilege Vulnerability
Use after free in Windows DHCP Server allows an authorized attacker to elevate privileges locally.
Other sources
Windows DHCP Server Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
What level of access does an attacker need?
An attacker must already be authorized on the affected system and able to act locally. The attack requires low privileges and does not require user interaction.
How difficult is exploitation expected to be?
The supplied vector rates attack complexity as high. Exploitation is local rather than network-based.
What could successful exploitation allow?
Successful exploitation could elevate the attacker’s privileges. The supplied vector indicates high potential impact to confidentiality, integrity, and availability.