NewsSecurity Vulnerabilities

Cisco NX-OS Software External Border Gateway Protocol Denial of Service Vulnerability [CVE-2024-20321]

CVE number – CVE-2024-20321

A vulnerability in the External Border Gateway Protocol (eBGP) implementation of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability exists because eBGP traffic is mapped to a shared hardware rate-limiter queue.

An attacker could exploit this vulnerability by sending large amounts of network traffic with certain characteristics through an affected device.

A successful exploit could allow the attacker to cause eBGP neighbor sessions to be dropped, leading to a DoS condition in the network.

Cisco has released software updates that address this vulnerability.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:


Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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