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CVE-2026-13188— DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX

Quick assessment

Affected
Progress Software Telerik UI for ASP.NET AJAX
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Progress Telerik UI for AJAX是Progress Software公司的一套Web界面组件库。 Progress Software Progress Telerik UI for AJAX 2026.2.708之前版本存在输入验证错误漏洞，该漏洞源于DialogHandler请求参数可能被篡改，从而改变对话框服务器端行为并导致链式利用。

CVSS 5.9 · Medium EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Progress Software Telerik UI for ASP.NET AJAX 2011.2.712< 2026.2.708 affected
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I. Basic Information for CVE-2026-13188

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX
Source: CVE Program / CVE List V5
Vulnerability Description
In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Progress Software Progress Telerik UI for AJAX 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Progress Telerik UI for AJAX是Progress Software公司的一套Web界面组件库。 Progress Software Progress Telerik UI for AJAX 2026.2.708之前版本存在输入验证错误漏洞，该漏洞源于DialogHandler请求参数可能被篡改，从而改变对话框服务器端行为并导致链式利用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Progress Software Telerik UI for ASP.NET AJAX 2011.2.712 ~ 2026.2.708 -

II. Public POCs for CVE-2026-13188

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III. Intelligence Information for CVE-2026-13188

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Vendor Advisories for CVE-2026-13188 (1)

Same Patch Batch · Progress Software · 2026-07-22 · 13 CVEs total

CVE-2026-13185 8.1 HIGH PersistenceFramework Cookie Deserialization Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-13187 8.1 HIGH DialogHandler Provider Type Tampering Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-13181 8.1 HIGH RadAsyncUpload AsyncUploadTypeName Type Resolution Vulnerability in Telerik UI for ASP.NET
CVE-2026-13186 8.1 HIGH AppDataStorageProvider Path Traversal Deserialization Vulnerability in Telerik UI for ASP.
CVE-2026-13190 8.1 HIGH PersistenceFramework Unsafe Type Resolution Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-13189 7.5 HIGH SpellChecker DictionaryLanguage Path Traversal Vulnerability in Telerik UI for ASP.NET AJA
CVE-2026-13184 7.5 HIGH RadAsyncUpload Default HMAC Key Fallback Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-13182 7.5 HIGH RadAsyncUpload Client-State Decrypt-vs-Parse Oracle Vulnerability in Telerik UI for ASP.NE
CVE-2026-13183 7.5 HIGH RadAsyncUpload Upload Metadata Timing Oracle Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-14932 6.5 MEDIUM Unauthenticated File Read and Deletion via Hardcoded Encryption Key in RadChart
CVE-2026-13192 6.5 MEDIUM RadEditor PDF Export SSRF Vulnerability in Telerik UI for ASP.NET AJAX
CVE-2026-14865 5.3 MEDIUM XXE Denial of Service via RadLayoutBuilder Client State in Telerik UI for ASP.NET AJAX

IV. Related Vulnerabilities

Same product: Telerik UI for ASP.NET AJAX
Same vendor: Progress Software
Same weakness: CWE-345