CVE-2026-33824

Published: Apr 14, 2026Modified: Sep 25, 2026CISA KEV

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (23)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

13 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

23 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	version < 10.0.14393.9060
Microsoft Windows 10 1607	version < 10.0.14393.9060
Microsoft Windows 10 1809	version < 10.0.17763.8644
Microsoft Windows 10 1809	version < 10.0.17763.8644
Microsoft Windows 10 21h2	version < 10.0.19044.7184
Microsoft Windows 10 21h2	version < 10.0.19044.7184
Microsoft Windows 10 21h2	version < 10.0.19044.7184
Microsoft Windows 10 22h2	version < 10.0.19045.7184
Microsoft Windows 10 22h2	version < 10.0.19045.7184
Microsoft Windows 10 22h2	version < 10.0.19045.7184
Microsoft Windows 11 23h2	version < 10.0.22631.6936
Microsoft Windows 11 23h2	version < 10.0.22631.6936
Microsoft Windows 11 24h2	version < 10.0.26100.8246
Microsoft Windows 11 24h2	version < 10.0.26100.8246
Microsoft Windows 11 25h2	version < 10.0.26200.8246
Microsoft Windows 11 25h2	version < 10.0.26200.8246
Microsoft Windows 11 26h1	version < 10.0.28000.1836
Microsoft Windows 11 26h1	version < 10.0.28000.1836
Microsoft Windows Server 2016	version < 10.0.14393.9060
Microsoft Windows Server 2019	version < 10.0.17763.8644
Microsoft Windows Server 2022	version < 10.0.20348.5020
Microsoft Windows Server 2022 23h2	version < 10.0.25398.2274
Microsoft Windows Server 2025	version < 10.0.26100.32690

Related CWEs

The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

References (3)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33824

Source: secure@microsoft.com

Vendor Advisory

https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Third Party Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33824

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

Timeline

No history available yet.