Secunia

Using Outlook and Outlook Express, it is possible to send and receive message/partial emails, this means that an email can be split into multiple parts when sent and reassembled when received again.

Many antivirus gateways fails to recognise this message/partial format, due to the fact that they fail to reassemble and scan the messages, malware may pass the antivirus gateway.

Multiple vendors have been informed, as well as CERT. We expect to see updates from all affected vendors soon. It is not yet known if more vendors are affected.

We will update this advisory when we know more. It will not be sent again unless new significant information becomes available.

Solution
If possible configure your mailserver og mailgateway to drop message/partial emails by default.
Further details available in Customer Area

Deep Links
Links available in Customer Area