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CVE-2019-18935

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization...

9.8 CriticalIn KEVPublic exploit

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.)

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

99.7%Up 38.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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.)

Record
CVE-2019-18935
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-502
Updated
2026-11-02
CVE List 9.8

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.)

Record
CVE-2019-18935
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
EUVDEUVD-2019-8608 9.8

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.)

Record
EUVD-2019-8608
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-c655-3j45-33xw 9.8

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization...

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. (In 2019.3.1023 but not earlier versions, a non-default setting can prevent exploitation.)

Record
GHSA-c655-3j45-33xw
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
CISA KEV No score

Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability

Progress Telerik UI for ASP.NET AJAX contains a deserialization of untrusted data vulnerability through RadAsyncUpload which leads to code execution on the server in the context of the w3wp.exe process.

Record
CVE-2019-18935
Weakness
CWE-502
Updated
2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubbao7uo/RAU_crypto2018-01-09
MetasploitTelerik UI ASP.NET AJAX RadAsyncUpload Deserialization2019-12-09
PoC in GitHubnoperator/CVE-2019-189352019-12-12
Exploit-DBTelerik UI - Remote Code Execution via Insecure Deserialization2019-12-18
PoC in GitHubbecrevex/Telerik_CVE-2019-189352020-05-17
PoC in GitHubThanHuuTuan/Telerik_CVE-2019-189352020-05-25
PoC in GitHubThanHuuTuan/CVE_2019_189352020-05-29
PoC in GitHubmurataydemir/CVE-2019-189352020-08-19
PoC in GitHubappliedi/Telerik_CVE-2019-189352020-08-26
PoC in GitHubrandom-robbie/CVE-2019-189352020-09-30
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Public exploits
SourceLinkDate
PoC in GitHub0xAgun/CVE-2019-18935-checker2021-10-29
PoC in GitHubKasunPriyashan/Telerik-UI-ASP.NET-AJAX-Exploitation2022-10-13
PoC in GitHubdust-life/CVE-2019-18935-memShell2023-12-25
PoC in GitHubclarkvoss/telerik2025-03-01
PoC in GitHubekkoo-z/CVE-2019-18935-bypasswaf2025-07-09
PoC in GitHub0xsharz/telerik-scanner-CVE-2019-189352025-08-22
PoC in GitHubquyt0/CVE-2019-18935-exploit-study2025-09-11
PoC in GitHubmenashe12346/CVE-2019-189352025-10-23
PoC in GitHubalanbarret/CVE-2019-189352025-12-08

History

History
RecordedChangedSources
exploitation, exploits
first indexedCVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-18935 is a critical vulnerability (CVSS 9.8) in Progress Telerik Ui For Asp.net Ajax, published December 11, 2019. CISA lists it as known to be exploited, since November 3, 2021. EUVD reports exploitation since November 3, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 99.7%, the 99th percentile. No source names a fixed version.

References

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