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Vulnerability record · CVE-2026-13186 · published 22 July 2026

CVE-2026-13186: Progress telerik ui for asp.net ajax path traversal vulnerability

Progress · Telerik Ui For Asp.Net Ajax

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.

8.1 CVSS 3.1 High EPSS 0.73% · top 47.6% CWE-22 · Path traversal
8.1CVSS 3.1 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
6 Aug 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-appdata-path-traversal-deserializa Vendor AdvisoryMitigation

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-11357Telerik UI for ASP.NET AJAX RadAsyncUpload unrestricted file uploadProgress Telerik UI for ASP.NET AJAX before R2 2017 SP2 fails to properly restrict user input to the RadAsyncUpload control, allowing arbitrary file …KEVEPSS 78%analysed9.8CVE-2026-6023Progress telerik ui for asp.net ajax deserialization of untrusted data vulnerabilityIn Progress® Telerik® UI for AJAX versions 2024.4.1114 through 2026.1.421, the RadFilter control is vulnerable to insecure deserialization when resto…EPSS 0.73%9.8CVE-2021-28141Progress telerik ui for asp.net ajax missing authorization vulnerabilityAn issue was discovered in Progress Telerik UI for ASP.NET AJAX 2021.1.224. It allows unauthorized access to MicrosoftAjax.js through the Telerik.Web…EPSS 2.2%9.8CVE-2019-19790Progress telerik ui for asp.net ajax path traversal vulnerabilityPath traversal in RadChart in Telerik UI for ASP.NET AJAX allows a remote attacker to read and delete an image with extension .BMP, .EXIF, .GIF, .ICO…EPSS 3.0%8.1CVE-2026-13185Progress telerik ui for asp.net ajax deserialization of untrusted data vulnerabilityIn Progress® Telerik® UI for AJAX prior to v2026.2.708, applications using cookie-based storage in RadPersistenceManager or RadDockLayout deserialize…EPSS 0.67%8.1CVE-2026-13187Progress telerik ui for asp.net ajax vulnerabilityIn Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler provider type input may be tampered with, potentially altering dialog processin…EPSS 0.47%8.1CVE-2026-13190Progress telerik ui for asp.net ajax deserialization of untrusted data vulnerabilityIn Progress® Telerik® UI for AJAX prior to v2026.2.708, a deserialization vulnerability in the persistence utilities allows unsafe type instantiation…EPSS 0.67%8.1CVE-2026-13181Progress telerik ui for asp.net ajax vulnerabilityIn Progress® Telerik® UI for AJAX prior to v2026.2.708, forged upload metadata can influence AsyncUploadTypeName processing and trigger unsafe attack…EPSS 0.68%

Source: NIST National Vulnerability Database (record CVE-2026-13186), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.