CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free
An unauthorized attacker can execute code over the network via a double free vulnerability in the Windows IKE Service Extensions.
- Exploited in the wild
- Since 18 Aug 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33824?
CVE-2026-33824 is a critical use after free vulnerability in Microsoft Windows 10 1607, published on 14 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
Weakness: CWE-415
Which versions are affected by CVE-2026-33824?
It affects 13 products.
Products include Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 and 7 more.
How do I fix CVE-2026-33824?
No fix has been published for CVE-2026-33824 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 21 Aug 2026.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-33824 being exploited?
Yes. Attackers have exploited CVE-2026-33824 in the wild since at least 18 Aug 2026.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10 1607
- CVE-2026-21510 Microsoft Windows Shell Protection Mechanism Failure
- CVE-2026-21513 Microsoft MSHTML Framework Protection Mechanism Failure
- CVE-2023-32049 Microsoft Windows Defender SmartScreen Security Feature Bypass
- CVE-2023-29360 Microsoft Streaming Service Untrusted Pointer Dereference
- CVE-2026-85880 Microsoft Windows Heap-Based Buffer Overflow
Sources
Also known as GHSA-q6qf-3m2m-xq4f.