CVE-2026-13186

HIGH 8.1

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

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	progress software
Product	telerik ui for asp.net ajax
Published	Jul 22, 2026

Stay Ahead of the Next One

Get instant alerts for progress software telerik ui for asp.net ajax

Be the first to know when new high vulnerabilities affecting progress software telerik ui for asp.net ajax are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Progress Software / Telerik UI for ASP.NET AJAX

2013.1.220 < 2026.2.708

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Markus Wulftange with CODE WHITE GmbH