Vulnerability Details CVE-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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.3%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-40306
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.0.0
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.0.1
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.1.0
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.1.1
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.1.2
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.2.0
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cpe:2.3:a:dnnsoftware:dotnetnuke:10.2.1