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When vulnerability is found within a system, an “exploit” is needed to provide access to the computer. The vulnerability can be a glitch, a bug, or even a simple design weakness within the hardware or software.  Once the weakness is discovered, an attacker can use software or commands to carry out some sort of malicious intent such as a worm, virus, or a denial-of-service attack.  On many occasions, once a vulnerability is discovered by a hacker, it is immediately posted to a website or discussed in forums so others can take advantage of it.  Even though there are no known inoculations against future exploits, patches and/or fixes are our only line of defense to protect us once a weakness is discovered.  Thus, it is very important for us to update our systems often.

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