PT-2026-34266 · Progress · Telerik Ui For Ajax

Published 2026-04-22 · Updated 2026-05-05 · CVE-2026-6023

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Telerik UI for AJAX versions 2024.4.1114 through 2026.1.421

Description The RadFilter control is subject to insecure deserialization during the restoration of filter state when that state is exposed to the client. An attacker can tamper with this state to achieve server-side remote code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-6023

Affected Products

Telerik Ui For Ajax

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-6023 · Security Note
• https://telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-deserialization-of-untrusted-data-cve-2026-6023 · Vendor Advisory
• https://twitter.com/cybrsecpath/status/2047360436841160906 · Twitter Post
• https://twitter.com/CVEnew/status/2047428145805238438 · Twitter Post
• https://t.me/cveNotify/162233 · Telegram Post