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Microsoft is adding .xlsb and .xltm files to its list of attachments blocked from direct opening in Outlook, forcing users to save them first.
Summary
The change aims to disrupt macro-based malware delivery vectors and will roll out gradually across platforms. This brings the total restricted file types to over a dozen.
This is a brief wire summary, the full story (linked below) has the complete details.
KazaSec's take
Stories like this are part of why proactive security testing exists, finding the gap before someone else does is always cheaper than responding after the fact.
Coverage details
We've archived 100 other articles touching the same topic (outlook attachment security, macro-enabled attachments, appsecurityupdate) , see the full security news archive.
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