CVE-2026-20200

Cisco · Unified Computing System (Standalone)

A command injection vulnerability in the Cisco IMC management interface allows authenticated, low-privilege users to execute arbitrary commands and escalate to root privileges.

Executive summary

A critical command injection vulnerability in the Cisco Unified Computing System management interface allows authenticated attackers to achieve full root-level system compromise.

Vulnerability

This vulnerability, categorized as CWE-141, exists due to improper neutralization of parameter delimiters within the web-based management interface. It requires an authenticated attacker with low privileges to trigger the flaw, resulting in arbitrary operating system command execution.

Business impact

Successful exploitation grants an attacker administrative control over the affected system. Given the CVSS score of 8.8, this poses a severe risk of data exfiltration, service disruption, and the potential for lateral movement within the network. The ability to escalate to root privileges makes this a high-priority concern for infrastructure security.

Remediation

Immediate Action: Apply the vendor-supplied security updates referenced in the Cisco security advisory at the earliest opportunity.

Proactive Monitoring: Monitor system access logs for anomalous command execution patterns or unauthorized attempts to access high-privilege shell functions.

Compensating Controls: Restrict access to the management interface to trusted administrative IP addresses using Access Control Lists (ACLs) to minimize the attack surface.

Exploitation status

Public Exploit Available: Yes, a public proof-of-concept exists on GitHub.

Analyst recommendation

This vulnerability presents a clear path to total system compromise for authenticated users. Organizations should prioritize patching affected Cisco IMC instances immediately to prevent potential exploitation.