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CVE-2026-83691 is a heap-based buffer overflow vulnerability in the Windows DHCP Server component affecting multiple versions of Microsoft Windows 10, including Version 1607. This vulnerability allows an authorized local attacker to elevate privileges. The issue has been assigned a high severity rating with a CVSS score of 7.8. Microsoft has released an official fix to address this vulnerability.

This vulnerability involves a heap-based buffer overflow in the Windows DHCP Server, which can be exploited by an authorized local attacker to elevate privileges on affected Windows 10 systems. The flaw affects various Windows 10 builds starting from version 1607 and other specified builds up to certain patched versions. The CVSS v3.1 score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. Microsoft has published an official security update to remediate this issue.

CVE-2026-83691 is a heap-based buffer overflow vulnerability in the Windows DHCP Server component affecting multiple versions of Microsoft Windows 10, including Version 1607. This vulnerability allows an authorized local attacker to elevate privileges. The issue has been assigned a high severity rat

CVE-2026-83691: CWE-122: Heap-based Buffer Overflow in Microsoft Windows 10 Version 1607

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