ET EXPLOIT IKEv2 Invalid Fragmented IKE_AUTH (CVE-2026-33824)

Query · suricata

flow:stateless,to_server;
flowbits:isset,ET.IKE.MS_Sec_VID;
content:"|35 20 23 08 00 00 00 01|"; offset:16; depth:8;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET EXPLOIT IKEv2 Invalid Fragmented IKE_AUTH (CVE-2026-33824) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert udp any any -> $HOME_NET [500,4500] (
    msg:"ET EXPLOIT IKEv2 Invalid Fragmented IKE_AUTH (CVE-2026-33824)";
    flow:stateless,to_server;
    flowbits:isset,ET.IKE.MS_Sec_VID;
    content:"|35 20 23 08 00 00 00 01|"; offset:16; depth:8;
    reference:url,www.zerodayinitiative.com/blog/2026/4/22/cve-2026-33824-remote-code-execution-in-windows-ikev2;
    reference:cve,2026-33824;
    classtype:attempted-user;
    sid:2069043; rev:1;
    metadata:attack_target Server, created_at 2026_04_28, cve CVE_2026_33824, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_04_28;
    target:dest_ip;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.