CVE-2026-40321
8.0 · HIGHOverview
CVE-2026-40321 is a high-severity vulnerability affecting dnnsoftware dotnetnuke. It was published on April 17, 2026 and has a CVSS 3.1 base score of 8.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.2.2, a user could upload a specially crafted SVG file that could include scripts that can target both authenticated and unauthenticated DNN users. The impact is increased if the scripts are run by a power user. Version 10.2.2 patches the issue.
Remediation
Check the references section for vendor advisories and patches from dnnsoftware. Update dotnetnuke 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 |
|---|---|---|---|
| dnnsoftware | dotnetnuke | >= 0, < 10.2.2 | Affected |
Frequently Asked Questions
What is CVE-2026-40321?
CVE-2026-40321 is a high-severity vulnerability affecting dnnsoftware dotnetnuke. It was published on April 17, 2026 and has a CVSS 3.1 base score of 8.0 (HIGH).
How severe is CVE-2026-40321?
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-40321?
Check the references section for vendor advisories and patches from dnnsoftware. Update dotnetnuke 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-2026-40321?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40321 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
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