CVE-2026-21232 Details
Description
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
A vulnerability allowing untrusted pointer dereference in Windows HTTP.sys has been identified, which could enable an authorized attacker to locally elevate privileges. This vulnerability affects multiple Windows 11 versions and Windows Server 2025, 2022, and 2023.
Users can download the security update for this vulnerability via the Microsoft Update Catalog. Specific update details can be found in the Microsoft Knowledge Base articles linked in the vulnerability reference.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21232 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-822 | Untrusted Pointer Dereference | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 11 23h2 | < 10.0.22631.6649 |
CPE
Remediation
| |
| microsoft windows 11 24h2 | < 10.0.26100.7781 |
CPE
Remediation
| |
| microsoft windows 11 25h2 | < 10.0.26200.7781 |
CPE
Remediation
| |
| microsoft windows server 2022 23h2 | < 10.0.25398.2149 |
CPE
Remediation
| |
| microsoft windows server 2025 | < 10.0.26100.32313 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 11, 2026 | Initial Analysis | [email protected] |
| Feb 10, 2026 | New CVE Received | [email protected] |