Windows Internet Key Exchange (IKE) Service Extensions IKEv2 Double-Free Remote Code Execution
CVE-2026-33824 is a critical remote code execution vulnerability in Windows Internet Key Exchange (IKE) Service Extensions, specifically described as a double-free condition in ikeext.dll. The flaw is reachable in the IKEv2 processing path and can be triggered pre-authentication by sending specially crafted network packets to a Windows system with IKEv2 enabled. Public reporting in the provided content consistently characterizes the vulnerable surface as Windows hosts acting as IKEv2 responders, including RRAS VPN, DirectAccess, and Always-On VPN infrastructure. Successful exploitation is reported to result in code execution in the context of LocalSystem.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
43 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical pre-authentication remote code execution double-free vulnerability in Windows IKEEXT (ikeext.dll) reachable over UDP/500 against IKEv2 responders, leading to code execution as LocalSystem.
A critical unauthenticated remote code execution vulnerability in Windows ikeext.dll caused by an IKEv2 double-free that can result in LocalSystem code execution.
A critical remote code execution vulnerability in Windows Internet Key Exchange (IKE) Service Extensions with CVSS 9.8, affecting secure IPsec association negotiation and potentially broad connectivity exposure.
A critical remote code execution vulnerability in Windows Internet Key Exchange (IKE) Service Extensions that can be exploited by sending specially crafted packets to a Windows machine with IKEv2 enabled.
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Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.