CVE-2026-7870

IBM · IBM i

A privilege escalation vulnerability in IBM i allows unauthorized users to execute code with administrator privileges via an unqualified library call.

Executive summary

A privilege escalation flaw in IBM i 7.x could allow a malicious actor to gain unauthorized administrative control over the system.

Vulnerability

The vulnerability stems from an unqualified library call within the system. This allows an authenticated user to manipulate the environment to run user-controlled code with elevated administrator privileges.

Business impact

With a CVSS score of 8.8, this vulnerability is classified as High. The ability for a lower-privileged user to escalate to administrator status presents a severe risk to system security, potentially enabling total system compromise, unauthorized data access, and the modification of critical system configurations.

Remediation

Immediate Action: Consult the official IBM security bulletin and apply the relevant security PTFs (Program Temporary Fixes) for your specific IBM i version.

Proactive Monitoring: Audit system logs for unexpected privilege changes or unauthorized execution of system-level utilities.

Compensating Controls: Restrict user permissions and enforce the principle of least privilege to minimize the potential impact if a local account is compromised.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Privilege escalation vulnerabilities are highly prized by attackers for maintaining persistence and expanding access. Administrators should prioritize applying the necessary IBM security updates to mitigate this risk and ensure that only authorized users maintain administrative capabilities.