{"id":"CVE-2026-77889","published":"2026-09-08T17:13:27Z","modified":"2026-10-30T21:51:52Z","title":"Windows DHCP Server Denial of Service Vulnerability","vendor":"Microsoft","product":"Windows 10 Version 1607","tier":"tail","description":{"text":"Access of resource using incompatible type ('type confusion') in Windows DHCP Server allows an unauthorized attacker to deny service over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.01174,"percentile":0.67499,"provenance":"source"},"cwes":[{"id":"CWE-843","name":"Access of Resource Using Incompatible Type"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77889","tags":["vendor-advisory","patch"]}],"priority":{"score":18.7,"factors":[{"name":"EPSS percentile","points":13.5},{"name":"CVSS severity","points":5.25}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[">= 10.0.14393.0, < 10.0.14393.9512"]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","versions":[">= 10.0.17763.0, < 10.0.17763.9245"]},{"vendor":"Microsoft","product":"Windows Server 2012","versions":[">= 6.2.9200.0, < 6.2.9200.26349"]},{"vendor":"Microsoft","product":"Windows Server 2012 (Server Core installation)","versions":[">= 6.2.9200.0, < 6.2.9200.26349"]},{"vendor":"Microsoft","product":"Windows Server 2012 R2","versions":[">= 6.3.9600.0, < 6.3.9600.23398"]},{"vendor":"Microsoft","product":"Windows Server 2012 R2 (Server Core installation)","versions":[">= 6.3.9600.0, < 6.3.9600.23398"]},{"vendor":"Microsoft","product":"Windows Server 2016","versions":[">= 10.0.14393.0, < 10.0.14393.9512"]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","versions":[">= 10.0.14393.0, < 10.0.14393.9512"]},{"vendor":"Microsoft","product":"Windows Server 2019","versions":[">= 10.0.17763.0, < 10.0.17763.9245"]},{"vendor":"Microsoft","product":"Windows Server 2019 (Server Core installation)","versions":[">= 10.0.17763.0, < 10.0.17763.9245"]}],"euvd":{"id":"EUVD-2026-73279","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-843"}}