The HP Photosmart C6280 network printer ships with unchangeable insecure default settings.
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HP Photosmart C6280 (and probably other) network printers ship with
insecure default settings. The printer ships with SNMP enabled
using the default community strings for both public and private.
HP does not document the use of SNMP, or provide a way for users to
change the default community strings. The printer also includes a
web based admin tool which runs over http, without even an option
for ssl.
Several attempts to contact HP have proven futile.