That sounds like an ideal attack vector! Norton and other AV have elevated privileges with an opaque data format ready to be exploited.
Unfortunately I wasn't prepared to broach the subject in a way that didn't have me say "you'd be safer without the AV". So I got nowhere.
Or do you eschew using a fork, because in 12 weeks in will fall on the floor?
Certainly, the problem is secret falls on the floor. The ones we can see can be handled.
This problem even happens with brand names, with hardware. You buy a fridge, and a decade later go to buy another. Meanwhile, megacorp has been bought by a conglomerate, and brand name is purposefully crap.
Speaking of which... it's remarkable that Microsoft Windows probably has code from 50,000 people in it. Yet there haven't been any (public) cases of people sneaking malicious code in. How come?