CVE-2026-19219

High

Description

In Progress® Telerik® UI for AJAX prior to v2026.3.812, insufficient integrity protection of dialog request parameters used by the RadEditor file browser may allow an attacker who has obtained certain application encryption key material to alter the folders the file browser reads from, writes to, and uploads into, potentially resulting in remote code execution.

SeverityHigh

CVSS8.1

Exploit probability—

ProductTelerik UI for ASP.NET AJAX

PublishedSep 2, 2026

First seenSep 2, 2026

Weakness typeCWE-345CWE-345 CWE-434Unrestricted upload of dangerous file type

How to fix

Update

Progress Software Telerik UI for ASP.NET AJAX2026.3.812 or later

Vendor advisories

telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-uploadpaths-tampering-cve-2026-19219

Affected products

Product	Affected versions	Fixed in
Progress Software Telerik UI for ASP.NET AJAX	2011.2.712 ≤ v < 2026.3.812	2026.3.812

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.