CVE-2026-14865— XXE Denial of Service via RadLayoutBuilder Client State 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之前版本存在资源管理错误漏洞，该漏洞源于内部LayoutBuilder控件处理客户端状态XML时未禁用DTD处理，允许未经身份验证的攻击者通过递归XML实体扩展导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Progress Software | Telerik UI for ASP.NET AJAX | 2009.1.314< 2026.2.708 |
affected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-14865
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
XXE Denial of Service via RadLayoutBuilder Client State 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, the internal LayoutBuilder control processes client-state XML without disabling DTD processing, allowing unauthenticated denial of service via recursive XML entity expansion.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: CVE Program / CVE List V5
Vulnerability Title
Progress Software Progress Telerik UI for AJAX 资源管理错误漏洞
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之前版本存在资源管理错误漏洞，该漏洞源于内部LayoutBuilder控件处理客户端状态XML时未禁用DTD处理，允许未经身份验证的攻击者通过递归XML实体扩展导致拒绝服务。
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 | 2009.1.314 ~ 2026.2.708 | - |
|
II. Public POCs for CVE-2026-14865
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-14865
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-14865 (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-2026-13188 | 5.9 MEDIUM | DialogHandler Parameters Tampering Vulnerability in Telerik UI for ASP.NET AJAX |
IV. Related Vulnerabilities
Same product: Telerik UI for ASP.NET AJAX
-
CVE-2026-19219
DialogHandler UploadPaths Tampering Vulnerability in Telerik -
CVE-2026-18672
RadImageEditor ClientState Unauthenticated Arbitrary File Re -
CVE-2026-14932
Unauthenticated File Read and Deletion via Hardcoded Encrypt -
CVE-2026-13192
RadEditor PDF Export SSRF Vulnerability in Telerik UI for AS -
CVE-2026-13190
PersistenceFramework Unsafe Type Resolution Vulnerability in
Same vendor: Progress Software
-
CVE-2026-106152
External Control of Configuration Setting in Telerik Report -
CVE-2026-106133
Incorrect Authorization in Telerik Report Server Web Report -
CVE-2026-106137
ClassFactory Race Condition and Retained Assembly Memory in -
CVE-2026-106156
Uncontrolled Resource Consumption in Telerik UI for ASP.NET -
CVE-2026-124694
Cross-Site Scripting in Kendo UI for jQuery PropertyGrid Val
Same weakness: CWE-776
-
CVE-2026-124038
Uncontrolled XML entity expansion in the Flock Installer app -
CVE-2026-124078
plist.js before 5.0.1 Uncontrolled Resource Consumption via -
CVE-2026-119724
Apache JClouds: XML External Entity (XXE) in provider-respon -
CVE-2026-115506
libexpat through 2.9.0 Denial of Service via Billion Laughs -
CVE-2026-108086
Apache Cocoon: XEE could lead to SSRF and information disclo