CVE-2024-20399: Cisco NX-OS Command Injection Allows Authenticated Root Execution
What It Is — Cisco NX‑OS contains a command‑injection flaw in its command‑line interface (CLI). An attacker who has already authenticated on the device can inject malicious input that is executed with root privileges on the underlying operating system.
Exploitability — The vulnerability is locally exploitable and requires valid credentials. No public exploit code has been released, but the attack path is straightforward once an account is compromised. Cisco has assigned a CVSS v3.1 base score of 8.8 (High).
Affected Products — Cisco NX‑OS software on Nexus switches and related data‑center networking gear. Cisco’s advisory (CISA KEV) lists all affected releases; customers should consult the vendor’s patch bulletin for exact version numbers.
Why It Matters for Trust & Control Assurance
- Privileged Access Management – The flaw bypasses normal privilege boundaries, exposing gaps in how privileged accounts are provisioned, monitored, and revoked.
- Audit‑Ready Logging – Root‑level command execution without proper logging erodes the evidentiary trail needed for compliance audits.
- Continuous Assurance – Enterprises must demonstrate that controls over CLI access are continuously enforced and that any deviation is promptly detected.
Recommended Actions
- Deploy Cisco’s security patch for CVE‑2024‑20399 without delay.
- Review privileged account policies: enforce least‑privilege, MFA, and session timeouts for CLI access.
- Enable detailed command‑logging on all NX‑OS devices and forward logs to a centralized SIEM for real‑time monitoring.
- Validate that your control framework includes regular privileged‑access reviews and audit‑trail verification.
Source: CISA KEV – CVE‑2024‑20399