ET WEB_SPECIFIC_APPS Cisco Secure Firewall Management Center Authentication Bypass (CVE-2026-20079)

Query · suricata

flow:established,to_server;
http.cookie;
content:"CGISESSID|3d|csm_processes"; fast_pattern;
target:dest_ip;
Raw source ET WEB_SPECIFIC_APPS Cisco Secure Firewall Management Center Authentication Bypass (CVE-2026-20079) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http any any -> $HOME_NET any (
    msg:"ET WEB_SPECIFIC_APPS Cisco Secure Firewall Management Center Authentication Bypass (CVE-2026-20079)";
    flow:established,to_server;
    http.cookie;
    content:"CGISESSID|3d|csm_processes"; fast_pattern;
    reference:url,www.vulncheck.com/blog/cisco-fmc-auth-bypass-cve-2026-20079;
    reference:cve,2026-20079;
    classtype:web-application-attack;
    sid:2068766; rev:1;
    metadata:affected_product Cisco_FMC, attack_target Server, tls_state TLSDecrypt, created_at 2026_04_15, cve CVE_2026_20079, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_04_15, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application;
    target:dest_ip;
)

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