DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Apr 17, 2026 · NIST NVD

   Detected

   DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. All new installations of DNN 10.x.x - 10.2.1 have the same Host GUID. This does not affect upgrades from 9.x.x. Version 10.2.2 patches the issue.

2. Jun 17, 2026 · NIST NVD

   Updated

   DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. All new installations of DNN 10.x.x - 10.2.1 have the same Host GUID. This does not affect upgrades from 9.x.x. Version 10.2.2 patches the issue.

Affected

• cpe dnnsoftware/dotnetnukeversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-40306

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-40306

  DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. All new installations of DNN 10.x.x - 10.2.1 have the same Host GUID. This does not affect upgrades from 9.x.x. Version 10.2.2 patches the issue.

  nvd.nist.gov

References

• Release Notes · github.com
• Vendor Advisory · github.com