CVE-2026-12943 in HMC
Summary
by MITRE • 07/30/2026
IBM HMC V10.3.1050.0 through 10.3.1064.0 and IBM HMC V11.1.1110.0 through 11.1.1112.0 Management systems in IBM Power environments (HMC and Novalink) could allow an unauthenticated user to execute arbitrary commands with elevated privileges on the system due to improper validation of user supplied input.
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability affects IBM Hardware Management Consoles and Novalink systems operating within IBM Power environments, specifically impacting versions ranging from HMC V10.3.1050.0 through 10.3.1064.0 and HMC V11.1.1110.0 through 11.1.1112.0. The flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data before processing, creating a critical security weakness that can be exploited by unauthenticated attackers. The vulnerability is classified as a command injection flaw under CWE-77 which represents one of the most severe categories of software vulnerabilities in cybersecurity. This issue directly relates to the ATT&CK technique T1059.001 for Command and Scripting Interpreter, enabling adversaries to execute arbitrary code on affected systems.
The technical implementation of this vulnerability allows an attacker to craft malicious input that bypasses authentication mechanisms and leverages the system's processing capabilities to execute commands with elevated privileges. IBM HMC systems typically operate with high-level administrative permissions and control critical hardware functions within Power environments, making this vulnerability particularly dangerous when exploited. The improper validation occurs during the handling of user inputs through various management interfaces including network protocols and command-line interfaces that the HMC system accepts for configuration and operational tasks.
The operational impact of this vulnerability extends beyond simple unauthorized access as it provides attackers with complete control over affected systems, potentially enabling them to modify system configurations, extract sensitive data, disable security controls, or establish persistent access points within the IBM Power environment. Organizations utilizing these management systems face significant risk of system compromise, data breaches, and potential disruption of critical infrastructure operations. The vulnerability's unauthenticated nature means that attackers can exploit it without requiring valid credentials, making detection and prevention more challenging for security teams.
Security mitigation strategies should include immediate implementation of IBM's official patches and updates as released through IBM Security Bulletins and advisory notices. Organizations must also implement network segmentation to limit access to HMC systems, deploy intrusion detection systems monitoring for suspicious traffic patterns, and establish strict access controls using multi-factor authentication where possible. Additional protective measures include regular security assessments, network monitoring for unauthorized command execution attempts, and implementation of least privilege principles for system administrators. The vulnerability demonstrates the critical importance of input validation in security-critical systems and reinforces industry best practices outlined in standards such as ISO 27001 and NIST cybersecurity frameworks that emphasize proper input sanitization and access control mechanisms to prevent similar command injection attacks.