Vulnerability Report

CVE-2019-18935

RCE CISA KEV Active

Title: Telerik Ui For Asp.Net Ajax RCE

RCE

Proof Of Concept

PoC Available for CVE-2019-18935

CWE Category CWE-502
Published Date Dec 11, 2019
Modified Date Nov 07, 2025
Exploit Status Available
Score 9.8 CVSS v3.1
Exploit Probability (EPSS)
93.58%

Vulnerability Summary

CVE-2019-18935: 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.)

Impacted Vendors

T
telerik 1

Reference Links

http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html https://github.com/bao7uo/RAU_crypto https://github.com/noperator/CVE-2019-18935 https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/ https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29 https://www.telerik.com/support/whats-new/release-history http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html https://github.com/bao7uo/RAU_crypto https://github.com/noperator/CVE-2019-18935 https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/ https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29 https://www.telerik.com/support/whats-new/release-history https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2019-18935 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/47793
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.