{"id":"CVE-2017-11317","published":"2017-08-23T17:29:00Z","modified":"2026-06-17T01:01:36Z","title":"Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability","vendor":"Telerik","product":"User Interface (UI) for ASP.NET AJAX","tier":"core","eol":null,"description":{"text":"Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.","provenance":"source","from":"NVD"},"summary":{"text":"Telerik UI for ASP.NET AJAX's Telerik.Web.UI component, specifically its RadAsyncUpload handling, uses weak encryption, which is a flaw in the product's file upload mechanism. A remote attacker with no authentication and no user interaction can exploit this to upload arbitrary files or execute arbitrary code.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:09:55Z"},"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":0.84175,"percentile":0.99695,"date":"2026-10-31","provenance":"source"},"kev":{"dateAdded":"2022-04-11","dueDate":"2022-05-02","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2017-11317","provenance":"source"},"vulncheckKev":{"dateAdded":"2020-06-19","exploitedFirstSeen":"2020-06-19","ransomware":false,"evidence":[{"url":"https://www.telerik.com/blogs/blue-mockingbird-vulnerability-telerik-guidance","date":"2020-06-19"},{"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":"2022-04-11"},{"url":"https://www.group-ib.com/resources/research-hub/hi-tech-crime-trends-2022/","date":"2023-01-17"},{"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://unit42.paloaltonetworks.com/silent-skimmer-latest-campaign/","date":"2024-11-07"},{"url":"https://go.catonetworks.com/rs/245-RJK-441/images/CATO_CTRL_Report_Q3_2024.pdf","date":"2024-11-20"},{"url":"https://www.oipc.bc.ca/documents/investigation-reports/2886","date":"2024-11-25"},{"url":"https://www.cloudsek.com/blog/an-insider-look-at-the-irgc-linked-apt35-operations","date":"2025-10-07"}],"evidenceTotal":11,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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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"}],"provenance":"machine"},"cwes":[{"id":"CWE-326","name":"Inadequate Encryption Strength"}],"references":[{"url":"http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/unrestricted-file-upload","tags":["Mitigation","Vendor Advisory"]},{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0006","tags":["Third Party Advisory"]},{"url":"https://www.exploit-db.com/exploits/43874/","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/unrestricted-file-upload","tags":["Mitigation","Vendor Advisory"]},{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0006","tags":["Third Party 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-2017-11317","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: Remote unauthenticated attack against public-facing web app","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX","start":0,"end":54}],"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 is the stated impact","mappingType":"primary_impact","evidence":[{"from":"description","quote":"or execute arbitrary code","start":197,"end":222}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1105","name":"Ingress Tool Transfer","tactics":["command-and-control"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Arbitrary file upload delivers attacker-controlled tooling","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows remote attackers to perform arbitrary file uploads","start":139,"end":196}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2017-2951","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-2951","exploited":true,"exploitedSince":"2022-04-11","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 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Deserialization","module":"exploit/windows/http/telerik_rau_deserialization","type":"exploit","disclosureDate":"2019-12-09","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/telerik_rau_deserialization.rb"}],"first":{"date":"2018-01-09","source":"PoC-in-GitHub","url":"https://github.com/bao7uo/RAU_crypto"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html","https://www.exploit-db.com/exploits/43874/"],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1059","T1105"],"provenance":"ai"}],"timeline":[{"date":"2017-08-23","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-11317","provenance":"source"},{"date":"2018-01-09","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub; later: Exploit-DB 2018-01-24, Metasploit 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