CVE-2026-33824

CriticalCVSS 9.8/10Known exploited (CISA KEV)Last modified Sep 25, 2026

Description

Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1607>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows 10 Version 1809>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows 10 Version 21H2>= 10.0.19044.0, < 10.0.19044.7184
MicrosoftWindows 10 Version 22H2>= 10.0.19045.0, < 10.0.19045.7184
MicrosoftWindows 11 version 23H2>= 10.0.22631.0, < 10.0.22631.6936
MicrosoftWindows 11 Version 23H2>= 10.0.22631.0, < 10.0.22631.6936
MicrosoftWindows 11 Version 24H2>= 10.0.26100.0, < 10.0.26100.8246
MicrosoftWindows 11 Version 25H2>= 10.0.26200.0, < 10.0.26200.8246
MicrosoftWindows 11 version 26H1>= 10.0.28000.0, < 10.0.28000.1836
MicrosoftWindows Server 2016>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows Server 2016 (Server Core installation)>= 10.0.14393.0, < 10.0.14393.9060
MicrosoftWindows Server 2019>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.17763.0, < 10.0.17763.8644
MicrosoftWindows Server 2022>= 10.0.20348.0, < 10.0.20348.5020
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)>= 10.0.25398.0, < 10.0.25398.2274
MicrosoftWindows Server 2025>= 10.0.26100.0, < 10.0.26100.32690
MicrosoftWindows Server 2025 (Server Core installation)>= 10.0.26100.0, < 10.0.26100.32690

References

Timeline

Published
Apr 14, 2026
Last modified
Sep 25, 2026
Added to CISA KEV
Aug 18, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-338257.8Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.CVE-2026-338268.0Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.CVE-2026-338278.1Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an unauthorized attackeCVE-2026-338287.8Trust boundary violation in Windows Attestation allows an authorized attacker to elevate privileges locally.CVE-2026-338294.3Exposure of sensitive information to an unauthorized actor in Windows Snipping Tool allows an unauthorized attacker to perform spoofing overCVE-2026-33835.5A weakness has been identified in ChaiScript up to 6.1.0. This affects the function chaiscript::Boxed_Number::go of the file include/chaiscrCVE-2026-338338.2Improper neutralization of special elements in output used by a downstream component ('injection') in Azure Machine Learning allows an unautCVE-2026-338347.8Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally.CVE-2026-338357.8Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.CVE-2026-338377.8Heap-based buffer overflow in Windows TCP/IP allows an authorized attacker to elevate privileges locally.CVE-2026-338387.8Double free in Windows Message Queuing allows an authorized attacker to elevate privileges locally.CVE-2026-338397.0Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Win32K - GRFX allows an authorized at
CVE-2026-33824: Critical severity, CVSS 9.8 | Vulnix