{"id":"CVE-2017-11357","published":"2017-08-23T17:29:00Z","modified":"2026-08-14T05:16:54Z","title":"Telerik UI for ASP.NET AJAX Insecure Direct Object Reference Vulnerability","vendor":"Telerik","product":"User Interface (UI) for ASP.NET AJAX","tier":"core","eol":null,"description":{"text":"Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an improper input restriction in the RadAsyncUpload component of Progress Telerik UI for ASP.NET AJAX, affecting versions before R2 2017 SP2. Remote attackers can exploit it to upload arbitrary files or execute arbitrary code, without needing authentication, user interaction, or special configuration beyond network access to the affected application.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T06:57:51Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.77679,"percentile":0.99563,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2023-01-26","dueDate":"2023-02-16","ransomware":true,"requiredAction":"Apply updates per vendor instructions.","notes":"https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/asyncupload-insecure-direct-object-reference; https://nvd.nist.gov/vuln/detail/CVE-2017-11357","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-10-20","exploitedFirstSeen":"2020-10-20","ransomware":true,"evidence":[{"url":"https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF","date":"2020-10-20"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-01-26"},{"url":"https://cisa.gov/news-events/cybersecurity-advisories/aa23-074a","date":"2023-03-15"},{"url":"https://www.cisa.gov/sites/default/files/2023-06/aa23-074a-Threat%20Actors%20Exploit%20Progress%20Telerik%20Vulnerabilities%20in%20Multiple%20U.S.%20Government%20IIS%20Servers.pdf","date":"2024-06-15"},{"url":"https://www.oipc.bc.ca/documents/investigation-reports/2886","date":"2024-11-25"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-434","name":"Unrestricted Upload of File with Dangerous Type"},{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-reference","tags":["Mitigation","Vendor Advisory"]},{"url":"https://www.exploit-db.com/exploits/43874/","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-reference","tags":["Mitigation","Vendor Advisory"]},{"url":"https://www.exploit-db.com/exploits/43874/","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11357","tags":["US Government Resource"]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: unauthenticated remote upload via public-facing web component","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"does not properly restrict user input to RadAsyncUpload","start":56,"end":111}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: arbitrary code execution after uploaded dangerous file","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows remote attackers to perform arbitrary file uploads or execute arbitrary code","start":119,"end":202}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2017-2986","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-2986","exploited":true,"exploitedSince":"2023-01-26","provenance":"source"},"exploits":[{"id":43874,"url":"https://www.exploit-db.com/exploits/43874","title":"Telerik UI for ASP.NET AJAX 2012.3.1308 < 2017.1.118 - Arbitrary File Upload","type":"webapps","platform":"aspx","date":"2018-01-24","verified":false,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":1,"earliest":"2018-01-24"},"first":{"date":"2018-01-24","source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/43874"},"provenance":"source"},"exploitRefs":["https://www.exploit-db.com/exploits/43874/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2017-08-23","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-11357","provenance":"source"},{"date":"2018-01-24","kind":"exploit-public","label":"First public exploit: Exploit-DB (EDB-43874)","url":"https://www.exploit-db.com/exploits/43874","provenance":"source"},{"date":"2020-10-20","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF","provenance":"source"},{"date":"2023-01-26","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-01-26","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-2986","provenance":"source"}],"speed":{"daysToPublicExploit":154,"firstExploitFrom":"Exploit-DB","daysToKev":1982},"priority":{"score":79.8,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 2200 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.91,"detail":"percentile 0.9956"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 Exploit-DB entry"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}