Critical severity9.8CISA KEVNVD Advisory· Published Dec 11, 2019· Updated Jun 17, 2026
CVE-2019-18935
CVE-2019-18935
Description
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.)
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:telerik:ui_for_asp.net_ajax:*:*:*:*:*:*:*:*Range: >=2011.1.315,<=2020.1.114
- Progress/Telerik UI for ASP.NET AJAXdescription
- Range: <=2019.3.1023
Patches
Vulnerability mechanics
References
9- www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserializationnvdPatchVendor Advisory
- packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.htmlnvdExploitThird Party AdvisoryVDB Entry
- know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-uinvdExploitThird Party Advisory
- packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.htmlnvdThird Party AdvisoryVDB Entry
- www.telerik.com/support/whats-new/release-historynvdRelease NotesVendor Advisory
- codewhitesec.blogspot.com/2019/02/telerik-revisited.htmlnvdNot Applicable
- www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/nvdPress/Media Coverage
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
- www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29nvdRelease Notes
News mentions
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