CVE-2026-2878

In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-insufficient-entropy-cve-2026-2878	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax:*:*:*:*:*:*:*:*

History

17 Jun 2026, 10:31

Type	Values Removed	Values Added
Summary		(es) En Progress® Telerik® UI para AJAX, versiones anteriores a 2026.1.225, existe una vulnerabilidad de entropía insuficiente en RadAsyncUpload, donde un identificador temporal predecible, basado en la marca de tiempo y el nombre de archivo, puede permitir colisiones y la manipulación del contenido del archivo.

26 Feb 2026, 15:23

Type	Values Removed	Values Added
CPE		cpe:2.3:a:progress:telerik_ui_for_asp.net_ajax::::::::
First Time		Progress Progress telerik Ui For Asp.net Ajax
References	~~() https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-insufficient-entropy-cve-2026-2878 -~~	() https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-insufficient-entropy-cve-2026-2878 - Mitigation, Vendor Advisory

25 Feb 2026, 15:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-25 15:20

Updated : 2026-06-17 10:31

NVD link : CVE-2026-2878

Mitre link : CVE-2026-2878

CVE.ORG link : CVE-2026-2878

JSON object : View

Products Affected

progress

telerik_ui_for_asp.net_ajax

CWE

CWE-331

Insufficient Entropy

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