November 3, 2021 · Applied Cybernetics Group
CVE-2019-18935 — Progress Telerik UI for ASP.NET AJAX
known ransomware use
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Progress
- Product
- Telerik UI for ASP.NET AJAX
- EPSS
- 100.0th percentile (score 0.997, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- ATT&CK
- T1041 , T1190 , T1496 , T1505.003 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2019-18935
CISA short description
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.
Required action
Apply updates per vendor instructions.