CVE-2026-20096: Medium Vulnerability in Cisco IMC

A vulnerability in the web-based management interface of Cisco IMC could allow an authenticated, remote attacker with admin-level privileges to perform command injection attacks on an affected system and execute arbitrary commands as the root user. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of the affected software. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system as the root user. Cisco has assigned this vulnerability a Security Impact Rating (SIR) of High, rather than Medium as the score indicates, because additional security implications could occur once the attacker has become root.

Vulnerability Details

The vulnerability is classified as a command injection vulnerability, identified by CWE-77. The CVSS score assigned to this vulnerability is 6.5, which falls within the medium severity range. This score reflects the potential impact on confidentiality and integrity, which are both rated as high. The affected product is Cisco IMC, and the vulnerability was published on April 1, 2026.

Technical Analysis

The root cause of this vulnerability lies in the improper validation of user-supplied input within the web-based management interface. The attack vector is network-based, and the attack complexity is low, meaning that an attacker does not require advanced skills to exploit this vulnerability. The privileges required are high, as the attacker must have admin-level access to the Cisco IMC. No user interaction is required for exploitation. If successfully exploited, the vulnerability could lead to high confidentiality and integrity impacts, as arbitrary commands could be executed with root privileges.

Risk & Impact Analysis

Risk to organizations includes the possibility of unauthorized access to sensitive data and the potential for significant damage to systems and operations. The impact could be widespread if the vulnerability is exploited, as attackers could gain control over critical infrastructure components. Organizations should assess their deployment of Cisco IMC and prioritize remediation based on the CVSS score and the nature of their environment.

Exploitation Status

Affected Versions

All versions prior to vendor patch are affected by this vulnerability.

Mitigation & Remediation

Organizations should prioritize patching immediately. Cisco has released patches to address this vulnerability. If patches cannot be applied immediately, consider implementing network controls to restrict access to the web-based management interface of affected systems. Additionally, review user permissions to ensure that only necessary personnel have admin-level access.

Detection Guidance

Monitor logs for unusual command executions or unauthorized access attempts to the Cisco IMC. Additionally, behavioral anomalies such as unexpected changes in system configurations should be investigated promptly.

AppSecure Threat Intelligence Insight

The presence of this command injection vulnerability highlights a broader trend of security risks associated with web-based management interfaces. Security teams should emphasize secure coding practices and input validation to mitigate similar vulnerabilities in the future. Regular security assessments, including penetration testing, can effectively identify and address these risks.

This vulnerability also serves as a reminder for organizations to stay vigilant regarding their security posture. Engaging in continuous monitoring and application security assessments can help in discovering and mitigating such vulnerabilities proactively.

In conclusion, organizations should ensure they are applying security updates promptly and implementing best practices in security to reduce the attack surface.