ET WEB_SPECIFIC_APPS Microsoft SharePoint Server Unauthenticated Remote Code Execution (CVE-2026-58644)
Sourceet/open
Fileemerging-web_specific_apps.rules
CreatedAugust 24, 2026
UpdatedAugust 24, 2026
Classificationweb-application-attack
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Microsoft SharePoint Server Unauthenticated Remote Code Execution (CVE-2026-58644)"; flow:established,to_server ; http.uri; content:"/_trust/default.aspx"; http.request_body; content:"wa|3d|wsignin1.0"; content:"|3a|RequestSecurityTokenResponse"; fast_pattern; content:"SecurityContextToken"; http.method; content:"POST"; reference:url,github.com/WismanSec/sharepoint-2026-poc ; reference:cve,2026-58644 ; classtype:web-application-attack; sid:2071774; rev:1; metadata:affected_product Microsoft_Sharepoint, attack_target Server, tls_state TLSDecrypt, created_at 2026_08_24, cve CVE_2026_58644, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Exploit, updated_at 2026_08_24, 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 productMicrosoft_Sharepoint
attack targetServer
tls stateTLSDecrypt
created at2026_08_24
deploymentInternal
confidenceHigh
signature severityMajor
tagExploit
updated at2026_08_24
mitre tactic idTA0001
mitre tactic nameInitial_Access
mitre technique idT1190
mitre technique nameExploit_Public_Facing_Application
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