Description
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – < 10.0.19044.6809 | 10.0.19044.6809 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – < 10.0.19045.6809 | 10.0.19045.6809 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – < 10.0.22631.6491 | 10.0.22631.6491 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 – < 6.1.7601.28117 | 6.1.7601.28117 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 – < 6.1.7601.28117 | 6.1.7601.28117 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 – < 6.0.6003.23717 | 6.0.6003.23717 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 – < 6.0.6003.23717 | 6.0.6003.23717 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < 6.2.9200.25868 | 6.2.9200.25868 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < 6.3.9600.22968 | 6.3.9600.22968 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.8783 | 10.0.14393.8783 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.8276 | 10.0.17763.8276 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.4648 | 10.0.20348.4648 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – < 10.0.25398.2092 | 10.0.25398.2092 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 3 modules
-
ESC8 Relay: SMB to HTTP(S) via Kerberos
auxiliary/server/relay/esc8_kerberos
-
DHCPv6 DNS Takeover (mitm6-style IPv6 DNS coercion)
auxiliary/spoof/dhcp/dhcpv6_dns_takeover
-
IPv6 Router Advertisement DNS Takeover (RDNSS IPv6 DNS coercion)
auxiliary/spoof/ipv6/ipv6_ra_dns_takeover
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- NCSC-2026-0007 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Apr 10, 2026
- WID-SEC-2026-0083 Microsoft Windows : Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 2, 2026
- MSRC-CVE-2026-20929 Windows HTTP.sys Elevation of Privilege Vulnerability Microsoft Security Response Center · Jan 13, 2026
References
- Windows HTTP.sys Elevation of Privilege Vulnerability vendor-advisory patch