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CVE-2026-14865

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

MEDIUM
5.3
CVSS Score
Published: July 22, 2026 at 01:45 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorTelerik UI for ASP.NET AJAX

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Telerik UI for ASP.NET AJAX· Progress
95%
2009.31314 ≤ v < 2026.2.7082009.1.314
Affected range stops below 2026.2.708, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMProgressSoftware
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-776

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