Hi Neojag,
There are thousands (6000+) of vulnerabilities discovered every year in mainstream software. Keeping a list of them all and which versions of which are vulnerable is a task large enough to require its own product or set of tools. There are several highly-respected vulnerability scanners that network admins can use to see if there are any "open doors" in their environment thanks to old unpatched versions. I won't recommend or endorse one over another as each has its own merits. Definitely something to explore! Do some research, play around with them and decide which is best for you. &: )
From a SEP perspective: keep your AV defs up to date, ensure that IPS is in use on all endpoints, patch Java, Flash and other third-party browser components, and keep an eye on the security news to know what threats are exploiting which vulns.
Adobe patches Flash Player vulnerability used in Pawn Storm APT campaign
https://www-secure.symantec.com/connect/blogs/adobe-patches-flash-player-vulnerability-used-pawn-storm-apt-campaign
Please do keep this thread up-to-date with any additional questions or mark it solved if you have received your answer.
With thanks and best regards,
Mick