CVE-2026-14865 | BDVDB-2026-351685 Detail

Progress SoftwareTelerik UI for ASP.NET AJAX

Description#

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.

Impact#

CAPEC-197 Exponential Data Expansion

Weaknesses#

CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

References#

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

Exploit#

No public exploit known

History#

Version 12026-07-22Record published in the CVE List.

Published

Published: 2026-07-22
Last modified: 2026-07-22

Vendor information

Vendor: Progress Software
Product: Telerik UI for ASP.NET AJAX

All Progress Software vulnerabilities

Score

5.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 37.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2009.1.314 and < 2026.2.708
Fixed
2026.2.708

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.3 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).