On 2024-07-02, CISA added CVE-2024-20399 (Cisco NX-OS) to its Known Exploited Vulnerabilities (KEV) catalog [2]. The vulnerability is listed in the catalog as "Cisco NX-OS Command Injection Vulnerability" [2]. CISA requires remediation in accordance with the listed vendor mitigation guidance; see the original text in the body for specific requirements [2].
Backfill: this event became public on Jul 2, 2024 and we added it on Nov 10, 2026. It is not a new event.
CISA Adds Cisco NX-OS Vulnerability CVE-2024-20399 to Known Exploited Vulnerabilities Catalog
1 min read
- Disclosed
- Jul 2, 2024
- Published
- Nov 10, 2026
- Last updated
- Nov 8, 2026
- CVSS basis
- Our assessment
- 4.3%, higher than 91% of CVEs
- Exploitation and patch status
- ExploitedKEV
- Attack vector
- Vulnerability status
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Government, Cross-industry
What to do nowOur advice
CISA requires remediation in accordance with the listed vendor mitigation guidance; see the original text in the body for specific requirements [2].
Timeline
Technical details
CISA KEV Listing Record
CISA added CVE-2024-20399 (Cisco NX-OS) to the Known Exploited Vulnerabilities () catalog on 2024-07-02 [2].
Original Technical Description
Cisco NX-OS contains a command injection vulnerability in the command line interface (CLI) that could allow an authenticated, local attacker to execute commands as root on the underlying operating system of an affected device. [2]
Official Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. [2]
Individual Vulnerability Record
The U.S. National Vulnerability Database (NVD) provides an independent vulnerability record and description for CVE-2024-20399 [1].
References
Official / primary3
- [1]
“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 ar”
- [2]
This site aggregates public information and is not security consulting advice. Test remediation steps before applying.