Looks like Steam has huge vulnerability, allowing stealing of your steam collection and running anything on your pc. https://www.reddit.com/r/Steam/comments/46px2w/psa_steamid_spoofing_on_every_steam_product_and/ https://np.reddit.com/r/pcgaming/comments/46uz6f/psa_flaws_in_sourceengine_games_allow_malicious/ Any idea is Rocksmith also affected?