CVE-2026-62823: Windows DHCP Server Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized 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 10.0.17763.9115Patch KB5120238 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26279Patch KB5120385 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23337Patch KB5120386 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62823?
The severity of CVE-2026-62823 is rated high with a score of 8.8.
How do I fix CVE-2026-62823?
To fix CVE-2026-62823, apply the latest security updates provided by Microsoft for the affected Windows DHCP Server versions.
What systems are affected by CVE-2026-62823?
CVE-2026-62823 impacts Microsoft Windows 10, Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025.
What type of vulnerability is CVE-2026-62823?
CVE-2026-62823 is classified as a heap-based buffer overflow vulnerability.
What can an attacker do with CVE-2026-62823?
An attacker exploiting CVE-2026-62823 can execute arbitrary code on affected systems over an adjacent network.