The nhrp-dos exploit allows an attacker to cause a denial of service by sending malicious packets to a Cisco router that is using the Next-Hop-Resolution Protocol (NHRP). This vulnerability is identified by the Cisco bug ID CSCin95836. NHRP is a protocol used by a source host/router to determine the next hop towards the destination in a Non-Broadcast-Multi-Access (NBMA) subnetwork. The exploit targets the NHRP functionality of Cisco routers and can disrupt network connectivity.