Cisco NX-OS Command Injection Vulnerability
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.
- Vendor
- Cisco
- Product
- NX-OS
- CVSS
- 6.0
- EPSS (exploit probability)
- 4.3%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2024-20399 being exploited?
Yes. CISA added CVE-2024-20399 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 4.3% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2024-20399 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Cisco NX-OS CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-76501 Cisco NX-OS SRv6 NGOAM unauthenticated root RCEwrite-up | [ CRITICAL ] | 9.8 | 0.5% | — |
| CVE-2026-76471 Cisco NX-OS NX-API unauthenticated root RCEwrite-up | [ CRITICAL ] | 9.8 | 0.5% | — |