CVE-2026-19219Network attack vector

Remote code execution via tampered dialog paths

Published Sep 2, 2026 · Updated Sep 3, 2026

Request-integrity failure in Progress Telerik UI for ASP.NET AJAX before 2026.3.812 allows remote attackers to achieve remote code execution. The RadEditor file browser's DialogHandler fails to authenticate path-bearing request parameters before using them for read, write, and upload folders. Exploitation requires application encryption key material, and successful path redirection permits dangerous files to reach executable server locations.

CVSS severity8.1
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Request-integrity failure in Progress Telerik UI for ASP.NET AJAX before 2026.3.812 allows remote attackers to achieve remote code execution. The RadEditor file browser's DialogHandler fails to authenticate path-bearing request parameters before using them for read, write, and upload folders. Exploitation requires application encryption key material, and successful path redirection permits dangerous files to reach executable server locations.

The record

CVE
CVE-2026-19219
Published
Sep 2, 2026
Updated
Sep 3, 2026
Vendor
Progress Software Corporation
Product
Telerik UI for ASP.NET AJAX
Classifications
CWE-345, CWE-434, CAPEC-153, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2011.2.712 <2026.3.812

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Progress Software Corporation · Telerik UI for ASP.NET AJAXversion=2011.2.712 <2026.3.812

Published CVSS scores

8.1Progress SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-153Input Data Manipulation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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