XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX
Published Jul 22, 2026
5.3
MEDIUMCVSS 3.1
EPSS 0.43%
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 products
-
- Version 2009.1.314StatusaffectedConstraints<2026.2.708
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Progress Software | Telerik UI for ASP.NET AJAX | unaffected |
|
- ≥ 2009.31314 · < 2026.2.708
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Jul 22, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Jul–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.43% (0.00432) | 35.27th | v5 (v2026.06.15) |
| Jul 23, 2026 | 0.40% (0.00402) | 32.78th | v5 (v2026.06.15) |
References (1)
- https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865 vendor-advisoryVendor AdvisoryMitigation
| Link | Providers | Tags |
|---|---|---|
| https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rlb-xxe-injection-client-state-cve-2026-14865 | vendor-advisoryVendor AdvisoryMitigation |
Change history (0)
No recorded changes yet.