CVE-2026-17438 in IBM
Summary
by MITRE • 08/13/2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to obtain sensitive information or modify data due to improper privilege management.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability affects IBM i operating systems versions 7.6, 7.5, 7.4, and 7.3, presenting a critical security flaw related to improper privilege management that enables local attackers to escalate their access and compromise system integrity. The vulnerability stems from inadequate controls over user privileges and access rights within the system architecture, allowing authenticated users with minimal privileges to potentially gain unauthorized access to sensitive information or modify critical data components. This weakness directly violates fundamental security principles of least privilege and principle of least privilege enforcement that are essential for maintaining system confidentiality and integrity.
The technical implementation of this vulnerability manifests through flawed privilege validation mechanisms within the IBM i operating system's security framework. Attackers can exploit this weakness by leveraging legitimate system access to manipulate privilege levels or bypass normal access controls that should prevent unauthorized data modification or information disclosure. The flaw exists in how the system validates user credentials and manages access permissions, potentially allowing local users to escalate their privileges from standard user accounts to administrative levels without proper authorization checks. This type of vulnerability is classified under CWE-276 which specifically addresses incorrect privilege assignment and improper access control mechanisms within operating systems.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential system compromise and complete loss of data integrity. Local attackers who successfully exploit this flaw can potentially modify critical system files, alter user permissions, access confidential business data, or even disrupt normal system operations through unauthorized modifications. The implications are particularly severe in enterprise environments where IBM i systems often host sensitive financial, customer, or operational data that requires strict access controls and audit trails. This vulnerability creates a pathway for insider threats or compromised accounts to escalate their privileges and cause significant damage to organizational security posture.
Mitigation strategies should focus on implementing comprehensive privilege management controls and ensuring proper system hardening measures are in place. Organizations must apply the latest IBM security patches and updates that address this specific privilege management flaw, while also conducting thorough privilege audits to identify and correct any excessive permissions granted to user accounts. System administrators should implement strict access control policies, regularly review user account privileges, and establish robust monitoring mechanisms to detect unauthorized privilege escalation attempts. The mitigation approach aligns with ATT&CK technique T1078 which addresses valid accounts and privilege escalation, requiring organizations to maintain proper credential management and access control enforcement. Additional protective measures include implementing multi-factor authentication for administrative accounts, establishing regular security assessments, and ensuring that system logs capture all privilege-related activities for forensic analysis and compliance auditing purposes.