{"id":"CVE-2026-20929","published":"2026-01-13T17:57:02Z","modified":"2026-07-30T20:47:22Z","title":"Windows HTTP.sys Elevation of Privilege Vulnerability","vendor":"Microsoft","product":"Windows 10 Version 1607","tier":"tail","description":{"text":"Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.02871,"percentile":0.86753,"provenance":"source"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20929","tags":["vendor-advisory","patch"]}],"priority":{"score":27.6,"factors":[{"name":"EPSS percentile","points":17.35},{"name":"Public exploit code","points":5.0},{"name":"CVSS severity","points":5.25}]},"exploitSources":{"metasploit":[{"name":"ESC8 Relay: SMB to HTTP(S) via Kerberos","module":"auxiliary/server/relay/esc8_kerberos","type":"auxiliary","disclosureDate":null,"url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/server/relay/esc8_kerberos.rb"},{"name":"DHCPv6 DNS Takeover (mitm6-style IPv6 DNS coercion)","module":"auxiliary/spoof/dhcp/dhcpv6_dns_takeover","type":"auxiliary","disclosureDate":null,"url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/spoof/dhcp/dhcpv6_dns_takeover.rb"},{"name":"IPv6 Router Advertisement DNS Takeover (RDNSS IPv6 DNS coercion)","module":"auxiliary/spoof/ipv6/ipv6_ra_dns_takeover","type":"auxiliary","disclosureDate":null,"url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/spoof/ipv6/ipv6_ra_dns_takeover.rb"}],"provenance":"source"},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":"Windows 10 Version 1607","versions":[">= 10.0.14393.0, < 10.0.14393.8783"]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","versions":[">= 10.0.17763.0, < 10.0.17763.8276"]},{"vendor":"Microsoft","product":"Windows 10 Version 21H2","versions":[">= 10.0.19044.0, < 10.0.19044.6809"]},{"vendor":"Microsoft","product":"Windows 10 Version 22H2","versions":[">= 10.0.19045.0, < 10.0.19045.6809"]},{"vendor":"Microsoft","product":"Windows 11 version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.6491"]},{"vendor":"Microsoft","product":"Windows 11 Version 23H2","versions":[">= 10.0.22631.0, < 10.0.22631.6491"]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1","versions":[">= 6.1.7601.0, < 6.1.7601.28117"]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1 (Server Core installation)","versions":[">= 6.1.7601.0, < 6.1.7601.28117"]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2","versions":[">= 6.0.6003.0, < 6.0.6003.23717"]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2 (Server Core installation)","versions":[">= 6.0.6003.0, < 6.0.6003.23717"]}],"euvd":{"id":"EUVD-2026-2134","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-microsoft-windows-cwe-284"}}