Cisco 6400 Access Concentrator Node Route Processor 2 (NRP2) 12.1DC card does not properly disable access when a password has not been set for vtys, which allows remote attackers to obtain access via telnet.Referenceshttp://www.ciac.org/ciac/bulletins/l-097.shtmlhttp://www.osvdb.org/804http://www.securityfocus.com/bid/2874https://exchange.xforce.ibmcloud.com/vulnerabilities/6691http://www.kb.cert.org/vuls/id/516659http://www.cisco.com/warp/public/707/6400-nrp2-telnet-vuln-pub.shtml
