In some cases, Norton Antivirus for Exchange (NavExchange) enters a fail-open state which allows viruses to pass through the server.
| Name | Vendor | Start Version | End Version | 
|---|---|---|---|
| Norton_antivirus | Symantec | 1.5 (including) | 1.5 (including) | 
| Norton_antivirus | Symantec | 2.0 (including) | 2.0 (including) |