Electronic lock for furniture, cabinets or lockers, comprising: - a case having means for the fixing thereof to the inner part of a door of a piece of furniture, cabinet or locker; - a locking element electronically activated; - a stand-alone power supply module with at least one battery; - electronic access means for receiving access data; - a wireless communication module for communication with a central control unit; - an electronic control module configured to operate the lock in any of the following modes of operation: • an offline mode, by means of which the locking element is activated based on the access data received, said activation being autonomously performed with respect to the central control unit; • an online mode, by means of which the access data received are sent to the central control unit via the wireless communication module and the activation of the locking element is performed based on the activating instructions remotely received via the wireless communication module from said central control unit, the lock automatically operating in an offline mode under conditions of a failure event in the communications with the central control unit; characterized in that the electronic access means are RFID and/or NFC proximity wireless means and comprise an RF antenna (15, 48) and an RFID and/or NFC reader for receiving access data from a passive tag or key, the RFID and/or NFC reader being configured to periodically energize the RF antenna (15, 48) while the lock is in stand-by, by emitting periodically a signal searching for a tag or key through the RF antenna (15, 48) and, in case of detecting an RFID and/or NFC identification, wake up the electronic control module and wireless communication module of the lock. - a case having means for the fixing thereof to the inner part of a door of a piece of furniture, cabinet or locker; - a locking element electronically activated; - a stand-alone power supply module with at least one battery; - electronic access means for receiving access data; - a wireless communication module for communication with a central control unit; - an electronic control module configured to operate the lock in any of the following modes of operation: • an offline mode, by means of which the locking element is activated based on the access data received, said activation being autonomously performed with respect to the central control unit; • an online mode, by means of which the access data received are sent to the central control unit via the wireless communication module and the activation of the locking element is performed based on the activating instructions remotely received via the wireless communication module from said central control unit, the lock automatically operating in an offline mode under conditions of a failure event in the communications with the central control unit; characterized in that the electronic access means are RFID and/or NFC proximity wireless means and comprise an RF antenna (15, 48) and an RFID and/or NFC reader for receiving access data from a passive tag or key, the RFID and/or NFC reader being configured to periodically energize the RF antenna (15, 48) while the lock is in stand-by, by emitting periodically a signal searching for a tag or key through the RF antenna (15, 48) and, in case of detecting an RFID and/or NFC identification, wake up the electronic control module and wireless communication module of the lock. • an offline mode, by means of which the locking element is activated based on the access data received, said activation being autonomously performed with respect to the central control unit; • an online mode, by means of which the access data received are sent to the central control unit via the wireless communication module and the activation of the locking element is performed based on the activating instructions remotely received via the wireless communication module from said central control unit, the lock automatically operating in an offline mode under conditions of a failure event in the communications with the central control unit;