This indicates an authentication vulnerability with HTTP server of a device running Cisco Internetwork Operating System (IOS).
IOS is an operating system that runs in a variety of products from Cisco Systems. Due to an error in local authentication database, an attacker can send a malformed Uniform Resource Locator (URL) to a vulnerable IOS device running HTTP server. Successful exploitation can grant the attacker execution privilege of arbitrary code on the affected machine.
Impact
An attacker can execute arbitrary command on infected systems and cause Denial-of-Service
