AEGLIX vulnerability intelligence
CVE-2019-18935
CRITICAL · CVSS 9.8 · Analyzed
Published: 2019-12-11 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.)
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-502
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Progress · Telerik UI for ASP.NET AJAX
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2022-05-03
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:telerik:ui_for_asp.net_ajax:*:*:*:*:*:*:*:*
From (inclusive): 2011.1.315
Through (inclusive): 2020.1.114
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html
Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html
Exploit · Third Party Advisory · VDB Entry
- https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html
Not Applicable
- https://github.com/bao7uo/RAU_crypto
Exploit · Third Party Advisory
- https://github.com/noperator/CVE-2019-18935
Exploit · Third Party Advisory
- https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui
Exploit · Third Party Advisory
- https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/
Press/Media Coverage
- https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization
Patch · Vendor Advisory
- https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29
Release Notes
- https://www.telerik.com/support/whats-new/release-history
Release Notes · Vendor Advisory
- http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html
Third Party Advisory · VDB Entry
- http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html
Exploit · Third Party Advisory · VDB Entry
- https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html
Not Applicable
- https://github.com/bao7uo/RAU_crypto
Exploit · Third Party Advisory
- https://github.com/noperator/CVE-2019-18935
Exploit · Third Party Advisory
- https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui
Exploit · Third Party Advisory
- https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/
Press/Media Coverage
- https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization
Patch · Vendor Advisory
- https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29
Release Notes
- https://www.telerik.com/support/whats-new/release-history
Release Notes · Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935
US Government Resource