CVE-2026-6023

critical

Published 2026-04-22 · Modified 2026-05-05

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

9.8

Description

In Progress® Telerik® UI for AJAX versions 2024.4.1114 through 2026.1.421, the RadFilter control is vulnerable to insecure deserialization when restoring filter state if the state is exposed to the client. If an attacker tampers with this state, a server-side remote code execution is possible.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@progress.com — https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-deserialization-of-untrusted-data-cve-2026-6023

Application impact

Vendor	Product	Versions	Fixed
progress	telerik_ui_for_asp.net_ajax	`{"startIncluding":"2024.4.1114","endExcluding":"2026.1.421"}`	`2026.1.421`

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-deserialization-of-untrusted-data-cve-2026-6023

CWEs

CWE-502

Verify integrity in audit chain (admin only). AS-IS.