Our takeCCCS relays Progress advisory AV26-875 on vulnerabilities in Telerik UI for ASP.NET AJAX prior to 2026.3.812. If you run it, update now.Cyber Resilience desk
What this means for you — Security leader:Review and patch Telerik UI for ASP.NET AJAX to 2026.3.812 or later if you use it in any web applications.
What this means for you — Lean IT orgs:If your website or internal tools use Telerik UI for ASP.NET AJAX, update it to version 2026.3.812 or newer as soon as possible.
What this means for you — MSP:Check client environments for Telerik UI for ASP.NET AJAX prior to 2026.3.812 and apply the Progress update.
What this means for you — Researcher:Review the CCCS advisory AV26-875 for details on the Telerik UI for ASP.NET AJAX vulnerabilities.