RadAsyncUpload Default HMAC Key Fallback Vulnerability in Telerik UI for ASP.NET AJAX
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Progress Software · Telerik UI for ASP.NET AJAX