CVE-2026-21250
Windows HTTP.sys Elevation of Privilege Vulnerability
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 7.8EPSS 1.0%KEV nãoPoC públicaPatch referenciado
Lifecycle
10 Feb 2026Published on NVD
04 May 2026Public PoC
Recommendation: Plan a near-term fix — a public PoC already exists.
Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
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
Affected products
Microsoft · Windows 11 Version 24H2Microsoft · Windows 11 Version 25H2Microsoft · Windows 11 version 26H1Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 1
exploitdbwww.exploit-db.com/exploits/52546unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Want to know if your infrastructure is exposed to this?
Talk to TrueHacking →