CVE-2026-2878
5.3 · MEDIUMOverview
CVE-2026-2878 is a medium-severity vulnerability affecting progress telerik_ui_for_asp.net_ajax. It was published on February 25, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from progress. Update telerik_ui_for_asp.net_ajax to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| progress | telerik_ui_for_asp.net_ajax | >= 0, < 2026.1.225 | Affected |
Frequently Asked Questions
What is CVE-2026-2878?
CVE-2026-2878 is a medium-severity vulnerability affecting progress telerik_ui_for_asp.net_ajax. It was published on February 25, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2026-2878?
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-2878?
Check the references section for vendor advisories and patches from progress. Update telerik_ui_for_asp.net_ajax to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-2878?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-2878 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
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