CVE-2026-13186 PUBLISHED

AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.NET AJAX

Assigner: ProgressSoftware
Reserved: 24.06.2026 Published: 22.07.2026 Updated: 22.07.2026

In Progress® Telerik® UI for AJAX prior to v2026.2.708, a path traversal vulnerability in the file-based persistence storage provider can be exploited when the storage key is derived from user-controlled input, enabling attacker-controlled deserialization and remote code execution.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 8.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Progress Software
Product	Telerik UI for ASP.NET AJAX
Versions	Default: unaffected affected from 2013.1.220 to 2026.2.708 (excl.)

Credits

Markus Wulftange with CODE WHITE GmbH finder

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-appdata-path-traversal-deserialization-CVE-2026-13186

Problem Types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE

Impacts

CAPEC-126 Path Traversal