When it comes to computer break-ins and breaches, there are plenty of ways to place blame, but some security missteps are more common than others - and most of them fall into the category of often-overlooked basics.

Among these blunders are the usual suspects: misconfigured servers, lack of patching, dangerous default settings and sloppy password management. However, security experts also pointed out less obvious mistakes, including negligent IT hiring and sharing of networks with business partners.

While security fiascos are often blamed on IT staff, analysts said business management personnel also contribute to vulnerabilities, which are almost always exploited eventually.

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