Deserialization in Progress Telerik Ui For Asp.net Ajax
CVE-2026-6023
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Progress Telerik Ui For Asp.net Ajax
- Progress Software Telerik Ui For Asp.net Ajax — versions 2024.4.1114
Weakness classification (CWE)
References
- www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-d… (vendor-advisory, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-6023?
- CVE-2026-6023 is a high-severity vulnerability in Progress Telerik Ui For Asp.net Ajax, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2026-04-22.
- How severe is CVE-2026-6023?
- High severity. CVSS v3 base score is 8.1 out of 10.