ET WEB_SPECIFIC_APPS Microsoft SharePoint Authenticated Remote Code Execution via Insecure Deserialization (CVE-2026-45659)

7.0.35.0SID: 2071422Rev: 1Enabled6 views
Sourceet/open
Fileemerging-web_specific_apps.rules
CreatedAugust 7, 2026
UpdatedAugust 7, 2026
Classificationweb-application-attack
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Microsoft SharePoint Authenticated Remote Code Execution via Insecure Deserialization (CVE-2026-45659)"; flow:established,to_server; http.uri; content:"/_api/web/lists/getbytitle"; fast_pattern; startswith; content:"/items"; distance:0; http.request_body; strip_whitespace; content:"|22|SP.Data.ListItem|22|"; content:"|22|Value|22 3a 22|"; pcre:"/^[^\x22]*?(?:U3lzdGVtLkRpYWdub3N0aWNzLlByb2Nlc3NTdGFydEluZm|N5c3RlbS5EaWFnbm9zdGljcy5Qcm9jZXNzU3RhcnRJbmZv|TeXN0ZW0uRGlhZ25vc3RpY3MuUHJvY2Vzc1N0YXJ0SW5mb)/R"; http.method; content:"POST"; reference:url,github.com/HORKimhab/CVE-2026-45659; reference:cve,2026-45659; classtype:web-application-attack; sid:2071422; rev:1; metadata:affected_product Microsoft_Sharepoint, attack_target Server, tls_state TLSDecrypt, created_at 2026_08_07, cve CVE_2026_45659, 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

urlgithub.com/HORKimhab/CVE-2026-45659
cve2026-45659

Metadata

affected productMicrosoft_Sharepoint
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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