Medium 5.3Published Jul 22, 2026

CVE-2026-14865XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX

Updated under an hour ago (Oct 25, 2026, 11:23 PM ET)

Does this affect you?

It affects Progress Software Telerik UI for ASP.NET AJAX and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Progress Software Telerik UI for ASP.NET AJAX

Exploited in the last 30 days

In Progress® Telerik® UI for AJAX prior to v2026.2.708, the internal LayoutBuilder control processes client-state XML without disabling DTD processing, allowing unauthenticated denial of service via recursive XML entity expansion.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-776
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: ProgressSoftware
NVD analysis: Analyzed
Record last updated: Jul 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Progress Software Telerik UI for ASP.NET AJAX progress_software:telerik_ui_for_asp.net_ajax (from the name)	from 2009.1.314 before 2026.2.708	CNA record
progress telerik_ui_for_asp.net_ajax progress:telerik_ui_for_asp.net_ajax	from 2009.31314 before 2026.2.708	NVD

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865vendor-advisory, mitigation

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.