CVE-2026-21232

Name: CVE-2026-21232
Creator: NVD / NIST
Published: 2026-02-10T18:16:23.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2026-21232 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.42%

33.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-822

Affected Software

Vendor	Product	Versions
Microsoft	Windows 11 23h2	< 10.0.22631.6649
Microsoft	Windows 11 24h2	< 10.0.26100.7781
Microsoft	Windows 11 25h2	< 10.0.26200.7781
Microsoft	Windows Server 2022 23h2	< 10.0.25398.2149
Microsoft	Windows Server 2025	< 10.0.26100.32313

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21232Vendor Advisory

Timeline

Published: Feb 10, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21232?

Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

How severe is CVE-2026-21232?

CVE-2026-21232 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2026-21232?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21232?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST