CVE-2026-62814: Windows DHCP Server Information Disclosure Vulnerability
Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.
Other sources
Windows DHCP Server Information Disclosure 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 6.2.9200.26279Patch KB5120385 - 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 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 6.3.9600.23337Patch KB5120386 - 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 10.0.20348.5499Fixed in 10.0.20348.5440Patch KB5120229
Event History
Frequently Asked Questions
What is the severity of CVE-2026-62814?
CVE-2026-62814 has a medium severity rating of 6.5.
What type of vulnerability is CVE-2026-62814?
CVE-2026-62814 is an integer underflow vulnerability in Windows DHCP Server.
How do I fix CVE-2026-62814?
To fix CVE-2026-62814, apply the latest security updates provided by Microsoft for affected Windows versions.
Which software versions are affected by CVE-2026-62814?
CVE-2026-62814 affects Microsoft Windows 10, Windows Server 2012, Windows Server 2016, Windows Server 2025, Windows Server 2012 R2, Windows Server 2019, and Windows Server 2022.
Can CVE-2026-62814 lead to an information disclosure?
Yes, CVE-2026-62814 allows an unauthorized attacker to disclose information over an adjacent network.