CVE-2026-13186

High

Description

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.

SeverityHigh

CVSS8.1

Exploit probability—

Product

Progress Telerik Ui For Asp.net Ajax

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

progress telerik_ui_for_asp.net_ajax2026.2.708 or later

Vendor advisories

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

Affected products

Product	Affected versions	Fixed in
progress telerik_ui_for_asp.net_ajax	2013.1.220 ≤ v < 2026.2.708	2026.2.708

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