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CVE-2019-18935 Details

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.)

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: CISA-ADPCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935	CISA-ADP	US Government Resource
http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html	CVE	Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html	CVE	ExploitThird Party AdvisoryVDB Entry
https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html	CVE	Not Applicable
https://github.com/bao7uo/RAU_crypto	CVE	ExploitThird Party Advisory
https://github.com/noperator/CVE-2019-18935	CVE	ExploitThird Party Advisory
https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui	CVE	ExploitThird Party Advisory
https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/	CVE	Press/Media Coverage
https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization	CVE	PatchVendor Advisory
https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29	CVE	Release Notes
https://www.telerik.com/support/whats-new/release-history	CVE	Release NotesVendor Advisory
http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html	[email protected]	Third Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html	[email protected]	ExploitThird Party AdvisoryVDB Entry
https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html	[email protected]	Not Applicable
https://github.com/bao7uo/RAU_crypto	[email protected]	ExploitThird Party Advisory
https://github.com/noperator/CVE-2019-18935	[email protected]	ExploitThird Party Advisory
https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui	[email protected]	ExploitThird Party Advisory
https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/	[email protected]	Press/Media Coverage
https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization	[email protected]	PatchVendor Advisory
https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29	[email protected]	Release Notes
https://www.telerik.com/support/whats-new/release-history	[email protected]	Release NotesVendor Advisory

see all 21 references

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability	Nov 3, 2021	May 3, 2022	Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-502	Deserialization of Untrusted Data	[email protected]
CWE-502	Deserialization of Untrusted Data	CISA-ADP

Affected Products

Product	Versions
telerik ui for asp.net ajax	>= 2011.1.315, <= 2020.1.114
CPE cpe:2.3:a:telerik:ui_for_asp.net_ajax:::::::: Remediation No remediation found in references.

Change History

18 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
Nov 7, 2025	Modified Analysis	[email protected]
Oct 22, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Oct 21, 2025	CVE Modified	CISA-ADP
Mar 14, 2025	Modified Analysis	[email protected]
Feb 4, 2025	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
Jul 25, 2024	Modified Analysis	[email protected]
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Mar 15, 2023	CVE Modified	[email protected]
Oct 20, 2020	CVE Modified	[email protected]
Jan 16, 2020	CVE Modified	[email protected]
Dec 19, 2019	Initial Analysis	[email protected]
Dec 18, 2019	CVE Modified	[email protected]
Dec 17, 2019	CVE Modified	[email protected]