questionscan a "smart tv" with full web browsing…

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It would be technically possible, but i doubt it would ever happen. The reason is pretty simple, what would people gain? How much credit card work are you going to do on your TV? Probably not much. More than that, exposure rates would be so low that it would not be very profitable. It's sort of the reason that Mac touts "more security". Less virus' are written for MacOS because there are less people using MacOS. It is going to be a far better use of a virus writer's time to write something for Windows.

vote-for5vote-against

Anything with an internal computer can get a "virus." Graphing calculators can get a virus. Video game systems can get a virus. Modern cars can get a virus (much scarier, right?).

So yes, smart TVs (or really any modern TV, though smart TVs are more vulnerable because they're internet-connected) can become infected. As rockytrh pointed out, it's less likely because people don't really have anything to gain from infecting a TV, but it's certainly possible, even if it's just because some knowledgeable guy is bored.

I wouldn't let it scare you away from getting a smart TV though, no more than the fear should stop you from getting anything with a computer in it, or else you'd just live your life paralyzed and buying nothing new. It's just a risk we face in life as everything we use is increasingly connected.

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Life's too short to worry about a virus. AFAIK, there is a cure for all viruses that are internet related. The chances are slim that you will get one.

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@rockytrh: I disagree with your point that it would never happen for a few reasons.
1) First, to your point of, “what would people gain?” As more apps are being developed for smart TVs, people will be using it for more, and saving their credentials on the devices. Currently, people use Netflix, Hulu, Amazon, etc. These logins are saved on the TVs. What if someone could attack the TV to capture the Amazon account? What about when Amazon develops a full shopping app for the TV? Or Google Shopper? What about when “we” do web banking from the TV. Etc. Let’s not forget pay-per-view services that one pays for with a credit card or Pay-pal. Now, add the fact that manufacturers would like to move to a day when we do everything from the television. Just last week one provider (I think it was a cable company) announced a platform to run your whole house from the television –
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vote-for2vote-against

that includes all media and entertainment, security alarm, video surveillance, heating and AC, electric and appliances, etc. Still think there is isn’t much to gain?
2) What really is a Smart TV? It’s a networked computer built into a television. Now, the computers are somewhat proprietary. But it won’t be long before they move to standard platforms, like Linux, Android, IOS, Windows, etc. So what will we then have? A computer that would be vulnerable to all the viruses to which the OS is vulnerable. And since its networked, possibly without a firewall or antivirus software, it is ready for attack via viruses, worms or hackers.
3) Bragging rights in the hacker world. “I’m the guy/group who took over all of the XYZ Smart TVs and streamed nothing but Al Jazeera for 24 hours.”
4) Never underestimate the power of people who do things just, “to see if it can be done”. Especially when it comes to computers and security.
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These are just the first few reasons that I came up with. Give me more time and I’m sure I’ll get some more....

vote-for1vote-against

Yes just about anything can get a virus, but unless you aren't running any form of NAT/Firewall at home, you TV wont be directly infectable from the outside. Even the most basic linksys router, wired or wireless doesn't allow worms and such in, so unless you port forward or have direct internet accessible ips available for every device in your house. Its unlikely to be infected. For my extra paranoia, I run vlans in my house, and my media server and equipment are on a different vlan from the desktops, so a stray virus on a desktop should not directly infect a media device etc. But in general that level of paranoia isn't needed. Yes it can happen, just not very likely