Windows CVE-2026-21232
HIGHCVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
AnalysisAI
Windows HTTP.sys contains an untrusted pointer dereference vulnerability that enables authenticated local users to escalate privileges on Windows 11 and Windows Server 2022/2025 systems. An attacker with valid credentials can exploit this flaw to gain elevated access without user interaction. …
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RemediationAI
Within 24 hours: Inventory all Windows systems running HTTP.sys and assess exposure in your environment; disable HTTP.sys if not required for operations. Within 7 days: Implement network segmentation to restrict local access to HTTP.sys-dependent services; enforce principle of least privilege on user accounts. …
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