CVE-2026-62720: 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 6.3.9600.23337Patch KB5120386 - 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 10.0.26100.33296Fixed in 10.0.26100.33222Patch KB5120228 - Upgrade
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Fixed in 10.0.14393.9418Patch KB5120418 - Upgrade
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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-2026-62720?
CVE-2026-62720 has a medium severity rating of 6.5.
How do I fix CVE-2026-62720?
To fix CVE-2026-62720, apply the latest security updates released by Microsoft for affected Windows Server and client versions.
What type of vulnerability is CVE-2026-62720?
CVE-2026-62720 is an integer underflow vulnerability that can lead to information disclosure.
Who is affected by CVE-2026-62720?
CVE-2026-62720 affects multiple versions of Windows, including Windows 10 and several iterations of Windows Server.
What impact can CVE-2026-62720 have on systems?
CVE-2026-62720 can allow an unauthorized attacker to disclose sensitive information over an adjacent network.