CVE-2026-69637: Windows DHCP Server Denial of Service Vulnerability
Out-of-bounds read in Windows DHCP Server allows an authorized attacker to deny service over an adjacent network.
Other sources
Windows DHCP Server Denial of Service 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 6.2.9200.26349Patch KB5123065 - 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 10.0.20348.5622Patch KB5122882 - 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 10.0.17763.9245Patch 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 issue affects systems running the Windows DHCP Server role among the listed Windows client and Server products.
What is the expected impact of successful exploitation?
Successful exploitation can deny service in Windows DHCP Server. The provided vector indicates no confidentiality or integrity impact, with availability affected.
Does exploitation require user interaction?
No user interaction is required according to the provided CVSS vector. The attacker does, however, need low-level privileges and adjacent-network access.