CVE-2026-6022: Progress Software Telerik UI for ASP.NET AJAX · Uncontrolled Resource Consumption
Affects Progress Software Telerik UI for ASP.NET AJAXSource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 2026.1.421 soon.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2026.1.421
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade Progress Software Telerik UI for ASP.NET AJAX to 2026.1.421.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Progress SoftwareTelerik UI for ASP.NET AJAX | Affected
| Fixed in
|
NuGettelerik.ui.for.aspnet.ajaxpkg:nuget/telerik.ui.for.aspnet.ajaxOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, consider implementing upload size monitoring and limiting mechanisms at network or application firewall levels to detect and block abnormal upload patterns. Review and restrict access to the RadAsyncUpload component where possible to reduce exposure.
Description
CVE-2026-6022 is a high-severity vulnerability in Progress Software's Telerik UI for ASP. NET AJAX prior to version 2026.1.421. The RadAsyncUpload component improperly enforces file upload size limits during chunk reassembly, allowing attackers to upload files exceeding the configured maximum size. This uncontrolled resource consumption can lead to disk space exhaustion on the affected system. No known exploits are reported in the wild. The vulnerability impacts availability but does not affect confidentiality or integrity.