Cisco Security Advisory – Cisco uBR10012 series devices automatically enable Simple Network Management Protocol (SNMP) read/write access to the device if configured for linecard redundancy. This can be exploited by an attacker to gain complete control of the device. Only Cisco uBR10012 series devices that are configured for linecard redundancy are affected. Cisco has released free software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/70290/cisco-sa-20080924-ubr.txt
Source: https://packetstormsecurity.com/files/70290/Cisco-Security-Advisory-20080924-ubr.html