Some clickbait nonsense. Genuinely.
This isn't anything like what its trying to spark fear over. it requires a credential stuffing attack that needs the following:
- A management interface exposed to the internet
- A lack of controls related to who can log in and where from
- The use of SSLVPN that does not utilize SAML or another form of OAuth
After all of that, and presuming they have a set of working credentials that have not been changed after the credentials were exposed in a breach, can they perform an attack.
Like with anything, working admin credentials will get you to a CLI, and from there you can do a lot. Protect your management interfaces. Do the bare minimum.