Cisco Systems releases security updates for its IOS software used on routers, switches and other networking gear. Vulnerabilities could be exploited by attackers to impact the performance of affected devices or force them to reboot. The newly released IOS versions contain patches for two vulnerabilities identified in the software’s Network Address Translation (NAT) feature. The Cisco IOS XR and Cisco XE software families are not affected by these two NAT vulnerabilities. A separate vulnerability was identified and patched in the IP version 6 (IPv6) protocol stack implementation.”]