CVE-2026-77895: CWE-125: Out-of-bounds Read in Microsoft Windows 10 Version 1607

CVE-2026-77895 is an out-of-bounds read vulnerability (CWE-125) in the Windows DHCP Server that affects several versions of Microsoft Windows 10, including Version 1607 and others. The vulnerability enables an unauthorized attacker to cause a denial of service condition over a network by exploiting this flaw. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has published an official fix for this vulnerability.

Successful exploitation of this vulnerability results in denial of service (DoS) over the network by causing an out-of-bounds read in the Windows DHCP Server. There is no impact on confidentiality or integrity. No known exploits are reported in the wild at this time.

An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for the affected Windows 10 versions as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77895. No additional mitigation actions are indicated by the vendor.