Samsung printers provides backdoor for attackers

Admin account in Samsung printers allows an attacker to take full control of the devices. The account seems to be a hard-coded community string with full SNMP read and write access. This account remains active, even when SNMP is disabled in the printer's administration interface. "As a general good security practice, only allow connections from trusted hosts and networks. Restricting access would prevent an attacker from accessing an SNMP interface using the affected credentials from a blocked network location," US-CERT advises. Besides Samsung-branded printers, some devices that the company produced for Dell also seem to be affected. However, the flaw seems to only affect models produced before 31 October 2012.