3Com Switch SS3 4400 switches, firmware 5.11, 6.00 and 6.10 and earlier, allow remote attackers to read the SNMP Read-Write Community string and conduct unauthorized actions via unspecified "normally restricted management packets on the device" that cause the community string to be returned.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29779
http://www.vupen.com/english/advisories/2006/4184
http://www.securityfocus.com/bid/20736
http://www.3com.com/securityalert/alerts/3COM-06-004.html