Nokia NFC Malicious Content Sharing The security features of Near Field Communication (NFC) compatible mobile phones needs to be seriously revised. NFC mobile phones can communicate with other NFC mobile phones, NFC readers, or RFID tags in so-called smart posters, for instance to exchange of small files with photos or contact details. To exchange files, two devices should be within the proximity coupling distance of 5 cm, besides this phisical constraint there is no user interaction required. We show that feature interaction between NFC and bluetooth, where an NFC connection starts a bluetooth connection without any request for permission, can be abused to surreptiously install software on an NFC phone. This results in a serious vulnerability, when, for instance “smart posters” start acting “smarter” and install malicious applications instead of providing some harmless information. We verified this vulnerability on the recently released Nokia 6212 Clasic phones