Vulnerability · Published Feb 10, 2026 · Assigned by microsoft
CVE-2026-21232Windows HTTP.sys Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity security flaw in Windows 11 version 22H3 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.4%top 61.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 – before 10.0.22631.6649 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 – before 10.0.22631.6649 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.7840 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.7840 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – before 10.0.28000.1575 |
| Microsoft | Windows 11 Version 26H1 | 10.0.28000.0 – before 10.0.28000.1575 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.2149 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.32370 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.32370 |
Weakness: CWE-822 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows HTTP.sys Elevation of Privilege Vulnerability vendor-advisory, patch