CVE-2026-69876: Windows DHCP Server Remote Code Execution Vulnerability
Use after free in Windows DHCP Server allows an authorized attacker to execute code over an adjacent network.
Other sources
Windows DHCP Server Remote Code Execution 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 6.3.9600.23397Patch KB5123066 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9512Patch KB5123099 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26349Patch KB5123065 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33438Patch KB5122871 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5622Patch KB5122882 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9245Patch KB5122876
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must be authorized and able to reach the target over an adjacent network. The provided data does not indicate that exploitation can be performed remotely over the internet.
What level of impact could successful exploitation have?
Successful exploitation can allow code execution and is rated as having high impacts to confidentiality, integrity, and availability. The vulnerability has a high severity rating with a score of 8.
Which systems should be reviewed for exposure?
Review deployments running Windows DHCP Server on the listed Microsoft Windows versions: Windows 10; Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025. Exposure depends on whether the DHCP Server role is present; the supplied data does not state that all default installations are affected.