Vulnerability · Published Jul 22, 2026 · Assigned by ProgressSoftware
CVE-2026-13181RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX
High 8.1
In plain English
A high-severity security flaw in Telerik UI for ASP.NET AJAX from Progress Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.7%top 45.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
In Progress® Telerik® UI for AJAX prior to v2026.2.708, forged upload metadata can influence AsyncUploadTypeName processing and trigger unsafe attacker-controlled type resolution, enabling remote code execution in affected deployments.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Progress Software | Telerik UI for ASP.NET AJAX | 2010.1.309 – before 2026.2.708 |
Weakness: CWE-470 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H