ET WEB_SERVER Cisco Unified Communications Manager 15.x Unauthenticated Remote Code Execution
Sourceet/open
Fileemerging-web_server.rules
CreatedAugust 7, 2026
UpdatedAugust 7, 2026
Classificationattempted-admin
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SERVER Cisco Unified Communications Manager 15.x Unauthenticated Remote Code Execution"; flow:established,to_server ; http.header; to_lowercase; content:"authorization|3a 20|basic|20|mw1kzgq0v0tpkzoxz2uxqvzxc3h"; fast_pattern; content:"x-forwarded-for|3a|"; pcre:"/^\s*(?:localhost|127\x2e(?:0\x2e){2}1|\x3a{2}1|(?:0\x2e){3}0)/R" ; reference:url,github.com/0xReadingSteiner/Silent-Call ; classtype:attempted-admin; sid:2071420; rev:1; metadata:affected_product Cisco_Unified_Communications_Manager, attack_target Server, tls_state TLSDecrypt, created_at 2026_08_07, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_07, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
References
Metadata
affected productCisco_Unified_Communications_Manager
attack targetServer
tls stateTLSDecrypt
created at2026_08_07
deploymentSSLDecrypt
confidenceHigh
signature severityMajor
tagExploit
updated at2026_08_07
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application
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