Cisco IOS and Cisco IOS XE Software are both products of Cisco, a U.S. company. Cisco IOS is a set of operating systems developed for its network devices. A single operating system for enterprise wired and wireless access, aggregation, core, and WAN, Cisco IOS XE reduces business and network complexity.A denial-of-service vulnerability exists in Cisco IOS and IOS XE Software, caused by improper interaction between the Web UI and the CLI parser, which could be exploited by an attacker to reload affected devices.