CVE-2024-20399
Published 2024-07-01 · Updated 2026-06-17 · Source psirt@cisco.com
Summary
CVE-2024-20399 is a medium-severity (CVSS 6.0) vulnerability in Cisco NX-OS. CISA added it to the Known Exploited Vulnerabilities catalog on July 2, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by July 23, 2024. CISA does not currently list it as used in ransomware campaigns. Cisco has 102 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.
All 102 known-exploited Cisco vulnerabilities →Description
A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administrator credentials to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of arguments that are passed to specific configuration CLI commands. An attacker could exploit this vulnerability by including crafted input as the argument of an affected configuration CLI command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of root. Note: To successfully exploit this vulnerability on a Cisco NX-OS device, an attacker must have Administrator credentials. The following Cisco devices already allow administrative users to access the underlying operating system through the bash-shell feature, so, for these devices, this vulnerability does not grant any additional privileges: Nexus 3000 Series Switches Nexus 7000 Series Switches that are running Cisco NX-OS Software releases 8.1(1) and later Nexus 9000 Series Switches in standalone NX-OS mode
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CISA Known-Exploited Vulnerability
Product: Cisco — NX-OS
Name: Cisco NX-OS Command Injection Vulnerability
Date added: 2024-07-02 · Due: 2024-07-23
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cmd-injection-xD9OhyOP
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cmd-injection-xD9OhyOP
- https://www.sygnia.co/threat-reports-and-advisories/china-nexus-threat-group-velvet-ant-exploits-cisco-0-day/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-20399