Vulnerability · Published Jul 22, 2026 · Assigned by ProgressSoftware
CVE-2026-13188DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX
Medium 5.9
In plain English
A medium-severity insufficient verification of data authenticity 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 0.2% (higher than 5% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.2%top 95.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Progress Software | Telerik UI for ASP.NET AJAX | 2011.2.712 – before 2026.2.708 |
Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N