In some cases, Norton Antivirus for Exchange (NavExchange) enters a "fail-open" state which allows viruses to pass through the server.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/4709http://www.osvdb.org/6266http://archives.neohapsis.com/archives/bugtraq/2000-06/0136.htmlhttp://www.securityfocus.com/bid/1351
