CVE-2026-21250
Analyzed
Analyzed - Analysis Complete
Untrusted Pointer Dereference in Windows HTTP.sys Elevates Privileges
Publication date: 2026-02-10
Last updated on: 2026-02-11
Assigner: Microsoft Corporation
Description
Description
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| microsoft | windows_server_2025 | to 10.0.26100.32313 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.7781 (exc) |
| microsoft | windows_11_24h2 | to 10.0.26100.7781 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.7781 (exc) |
| microsoft | windows_11_25h2 | to 10.0.26200.7781 (exc) |
| microsoft | windows_server_2022_23h2 | to 10.0.25398.2149 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-822 | The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves an untrusted pointer dereference in the Windows HTTP.sys component. It allows an authorized attacker to elevate their privileges locally on the affected system.
How can this vulnerability impact me? :
The impact of this vulnerability is an elevation of privilege, meaning an attacker who already has some level of access can gain higher privileges on the system. This can lead to full control over the affected system, potentially compromising confidentiality, integrity, and availability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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