{"id":"CVE-2019-18935","aliases":[],"url":"https://o3.security/vulnerability/CVE-2019-18935","summary":"Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are…","details":"Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)","published":"2019-12-11T13:15:11.767","modified":"2026-06-17T02:25:36.353","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.99737,"percentile":0.99953,"asOf":"2026-09-08"},"cisaKev":null,"exploitsKnown":22,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html"},{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html"},{"type":"WEB","url":"https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html"},{"type":"EXPLOIT","url":"https://github.com/bao7uo/RAU_crypto"},{"type":"EXPLOIT","url":"https://github.com/noperator/CVE-2019-18935"},{"type":"EXPLOIT","url":"https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui"},{"type":"WEB","url":"https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/"},{"type":"FIX","url":"https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization"},{"type":"WEB","url":"https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29"},{"type":"ADVISORY","url":"https://www.telerik.com/support/whats-new/release-history"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html"},{"type":"EXPLOIT","url":"http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html"},{"type":"WEB","url":"https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html"},{"type":"EXPLOIT","url":"https://github.com/bao7uo/RAU_crypto"},{"type":"EXPLOIT","url":"https://github.com/noperator/CVE-2019-18935"},{"type":"EXPLOIT","url":"https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui"},{"type":"WEB","url":"https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/"},{"type":"FIX","url":"https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization"},{"type":"WEB","url":"https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29"},{"type":"ADVISORY","url":"https://www.telerik.com/support/whats-new/release-history"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-06-17T02:25:36.353"}}