CVE-2026-13184

HIGH 7.5

RadAsyncUpload Default HMAC Key Fallback Vulnerability in Telerik UI for ASP.NET AJAX

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

In Progress® Telerik® UI for AJAX prior to v2026.2.708, when Telerik.Upload.ConfigurationHashKey is absent and machineKey is not explicitly configured, upload metadata integrity protection may fall back to a predictable default key, enabling attackers to forge protected upload metadata and unlock further exploit chains.

CWE	CWE-321
Vendor	progress software
Product	telerik ui for asp.net ajax
Published	Jul 22, 2026

Stay Ahead of the Next One

Get instant alerts for progress software telerik ui for asp.net ajax

Be the first to know when new high vulnerabilities affecting progress software telerik ui for asp.net ajax are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

Progress Software / Telerik UI for ASP.NET AJAX

2010.1.309 < 2026.2.708

References

NVD ↗ CVE.org ↗ EPSS Data ↗

telerik.com: https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-unauth-deserialization-chain-cve-2026-13184

Credits

Marcio Almeida of TantoSec