Cisco PIX 500 Series Security Appliances and ASA 5500 Series Adaptive Security Appliances, when running 7.0(x) up to 7.0(5) and 7.1(x) up to 7.1(2.4), and Firewall Services Module (FWSM) 3.1(x) up to 3.1(1.6), causes the EXEC password, local user passwords, and the enable password to be changed to a "non-random value" under certain circumstances, which causes administrators to be locked out and might allow attackers to gain access.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28540
http://www.vupen.com/english/advisories/2006/3367
http://www.securityfocus.com/bid/19681
http://www.cisco.com/warp/public/707/cisco-sa-20060823-firewall.shtml
http://securitytracker.com/id?1016740
http://securitytracker.com/id?1016739