ET WEB_SPECIFIC_APPS Juniper PTX Series On-Box Anomaly Detection Framwork Command Injection Attempt (CVE-2026-21902) M4
SURICATA detection rule by HydraDragonAntivirus · GPL-2.0
Dynamic and static analysis with Real Time Malware Analysis with Antivirus for Windows, including open-source XDR (3 EDR projects), ClamAV, YARA-X, machine learning AI, behavioral analysis, Unpacker, Deobfuscator, Decompiler, website signatures, Ghidra, Suricata, Sigma, Kernel, Hypervisior based protection and much more than you can imagine.
alert http $EXTERNAL_NET any -> $HOME_NET 8160 (msg:"ET WEB_SPECIFIC_APPS Juniper PTX Series On-Box Anomaly Detection Framwork Command Injection Attempt (CVE-2026-21902) M4"; flow:established,to_server; http.uri; bsize:21; content:"/config/config/commit"; startswith; fast_pattern; http.content_type; content:"application/json"; nocase; http.content_len; byte_test:0,=,0,0,string,dec; reference:url,labs.watchtowr.com/sometimes-you-can-just-feel-the-security-in-the-design-junos-os-evolved-cve-2026-21902-rce/; reference:cve,2026-21902; classtype:attempted-admin; sid:2068000; rev:2; metadata:affected_product JunOS, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_03_03, cve CVE_2026_21902, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2026_05_15, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)