CVE-2024-20399: in the CISA KEV catalogue
Cisco NX-OS Command Injection Vulnerability. CISA added CVE-2024-20399 to the Known Exploited Vulnerabilities catalogue on 2024-07-02 with a default due date of 2024-07-23. Known ransomware campaign use: Unknown. Forensic triage flag: No.
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. (CISA description)
- Vendor / product
- Cisco NX-OS
- CWE
- CWE-78
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS
- 4.3%, percentile 91 (scored 2026-11-03)
EPSS puts about 4.3 in 100 odds (4.3%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 91% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2024-20399 in the CISA KEV catalogue?
Yes. CISA added CVE-2024-20399 (Cisco NX-OS Command Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2024-07-02. CISA's default due date for it is 2024-07-23.
Is CVE-2024-20399 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2024-20399. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2024-20399?
CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2024-20399