Is CVE-2026-40321 actively exploited?

CVE-2026-40321 has no public evidence of in-the-wild exploitation as of 2026-04-24.

What is the CVSS score for CVE-2026-40321?

CVE-2026-40321 has a CVSS score of 8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.

How do I patch CVE-2026-40321?

Patch guidance is available from dnnsoftware security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-40321.

Which products are affected by CVE-2026-40321?

1 product: dnnsoftware dotnetnuke.

Fix CVE-2026-40321 - HIGH dnnsoftware dotnetnuke

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: low
User Action: required
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-87

Metadata

Primary Vendor: DNNSOFTWARE
Published: 4/17/2026
Last Modified: 4/24/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-40321

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary