Insufficient Entropy Vulnerability in Telerik UI for AJAX
CVE-2026-2878

5.3MEDIUM

Key Information:

Vendor

Progress Software
Status
Telerik Ui For Asp.net Ajax
Vendor
CVE Published:
25 February 2026

What is CVE-2026-2878?

A vulnerability exists in Telerik UI for AJAX prior to version 2026.1.225, where RadAsyncUpload uses predictable temporary identifiers derived from timestamps and filenames. This predictability can result in collisions, enabling unauthorized file content tampering and potential security breaches. It is essential to upgrade to the latest version to mitigate this risk.

Affected Version(s)

Telerik UI for ASP.NET AJAX 2011.2.712 < 2026.1.225

References

https://www.telerik.com/products/aspnet-ajax/documentatio...
vendor-advisory

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Monetary Authority of Singapore
.