Secunia Security Advisory – Two vulnerabilities have been reported in various Cisco products, which can be exploited by malicious people to spoof authenticated SNMPv3 packets.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/67223/sa30612.txt
Source: https://packetstormsecurity.com/files/67223/Secunia-Security-Advisory-30612.html