CVE-2026-6023

Name: CVE-2026-6023
Creator: NVD / NIST
Published: 2026-04-22T08:16:13.04+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.54%

Last modified Jun 17, 2026

CVE-2026-6023 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.54%

41.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Progress	Telerik Ui For Asp.Net Ajax	>= 2024.4.1114, < 2026.1.421

References

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

Timeline

Published: Apr 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-6023?

How severe is CVE-2026-6023?

CVE-2026-6023 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.

How do I fix CVE-2026-6023?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-6023?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST