Not sure if one is necessary, as they can pretty much fall under the Wallet software section.
https://bitcointalk.org/index.php?board=37.0On the other hand, such a section would probably be good for things like the LastPass breach, etc which aren't necessarily bitcoin/crypto-related.
We could also talk about cybersec topics outside of only wallets, though. For instance, in the hardware wallet section we sometimes stumble about general (even though maybe related) questions like: 'how (in)secure is NFC' and such, but creating a topic like that just doesn't fit in the wallet section.
We could then also quote and link between topics e.g. if someone asks about the threats of using a wired USB connection with their hardware wallet, link to a cybersecurity board topic talking about USB exploits.