CVE-2026-20929
HighPublished
Windows HTTP.sys Elevation of Privilege Vulnerability
- Published
- Jan 13, 2026
- Updated
- Jul 30, 2026
- Assigning CNA
- microsoft
- Evidence observed
- Aug 28, 2026
Primary CVSS
7.5/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H2.9%
Low · next 30 days
- Percentile
- 86.6%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Sources
Repository evidence: Files: 3 · Repositories: 1
3 Module
modules/auxiliary/server/relay/esc8_kerberos.rb
Metasploit Framework modulesDeclared conditions
- verification: check_declared($.auxiliary_server/relay/esc8_kerberos.check)
modules/auxiliary/spoof/dhcp/dhcpv6_dns_takeover.rb
Metasploit Framework modulesDeclared conditions
- verification: check_not_declared($.auxiliary_spoof/dhcp/dhcpv6_dns_takeover.check)
modules/auxiliary/spoof/ipv6/ipv6_ra_dns_takeover.rb
Metasploit Framework modulesDeclared conditions
- verification: check_not_declared($.auxiliary_spoof/ipv6/ipv6_ra_dns_takeover.check)
Responsible use
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