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CLSID vulerability in virus protection

I was running tests on the virus protection from the site www.testvirus.org and test number 25 was allowed through. Here is the context of the email I recived.

Test #25 (non-virus): Attachment with a CLSID extension which may hide the real file extension.  This does not include the Eicar virus, however your mail server should still block this since the CLSID technique can be used to hide the true extension of a malicious file. (attachment can be opened by any Windows computer)

Any thoughts on this?


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