ET WEB_SPECIFIC_APPS [aretiq.ai] Exchange EWS InstallApp with ManifestUrl Server-Side Request Forgery Attempt (CVE-2026-45502)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"InstallApp";
content:"ManifestUrl"; fast_pattern; distance:0;
pcre:"/^[^\x3c]*?(?:\x3a\x2f{2}|\x5c{2})/R";
Raw source ET WEB_SPECIFIC_APPS [aretiq.ai] Exchange EWS InstallApp with ManifestUrl Server-Side Request Forgery Attempt (CVE-2026-45502) · 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 [443,444] (
    msg:"ET WEB_SPECIFIC_APPS [aretiq.ai] Exchange EWS InstallApp with ManifestUrl Server-Side Request Forgery Attempt (CVE-2026-45502)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"InstallApp";
    content:"ManifestUrl"; fast_pattern; distance:0;
    pcre:"/^[^\x3c]*?(?:\x3a\x2f{2}|\x5c{2})/R";
    reference:cve,2026-45502;
    classtype:web-application-attack;
    sid:2070126; rev:1;
    metadata:affected_product Microsoft_Exchange, attack_target Web_Server, tls_state TLSDecrypt, created_at 2026_07_01, cve CVE_2026_45502, deployment Perimeter, deployment Internal, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_07_01, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1046, mitre_technique_name Network_Service_Discovery;
)

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