For those who use Internet Explorer,

Microsoft rushes urgent fix for Internet Explorer

It’s not Patch Tuesday, but Microsoft has released a crucial update for Internet Explorer that you should apply immediately.

Microsoft included a cumulative update for Internet Explorer in the 13 security bulletins that made up Patch Tuesday last week, and that update was considered Critical as well. Since then, though, a new flaw has been targeted by attacks in the wild, so Microsoft has responded with an out-of-band update...

Full story available at the following link,
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More details available at ComputerWorld,
Click HERE

Remember to create a backup before applying any Microsoft updates, just in case.