CVE-2026-20094

8.8

Cisco · Integrated Management Controller (IMC)

A command injection vulnerability in the Cisco IMC web interface allows an authenticated remote attacker with read-only privileges to execute arbitrary commands as the root user.

Executive summary

An authenticated command injection vulnerability in Cisco IMC products allows low-privileged users to achieve full root-level remote code execution.

Vulnerability

This is a command injection flaw (CWE-77) caused by improper input validation within the web-based management interface, which can be triggered by an authenticated attacker with read-only credentials.

Business impact

The ability for a read-only user to execute arbitrary commands as root constitutes a critical security failure, effectively granting the attacker full control over the affected hardware and its management functions. Given the CVSS score of 8.8, this vulnerability poses a severe risk to infrastructure integrity, potentially leading to total system compromise, data exfiltration, or the deployment of persistent backdoors within the server management plane.

Remediation

Immediate Action: Review the official Cisco security advisory (cisco-sa-cimc-cmd-inj-3hKN3bVt) to identify available firmware updates and apply them to all affected systems.

Proactive Monitoring: Monitor management interface access logs for unusual command patterns or unexpected attempts to invoke system-level utilities by low-privileged user accounts.

Compensating Controls: Restrict access to the IMC management interface to trusted administrative networks only, utilizing VPNs or jump hosts to minimize the exposure of the interface to unauthorized or compromised accounts.

Exploitation status

Public Exploit Available: No (exploit_available unknown)

Analyst recommendation

Given the high CVSS severity and the potential for full root-level control, organizations should prioritize patching affected Cisco IMC instances immediately upon the release of vendor updates. If immediate patching is not possible, strictly enforce the principle of least privilege for all management interface accounts and isolate the management network to prevent unauthorized access.

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