CVE-2026-17075 in IBM
Summary
by MITRE • 08/13/2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information and perform unauthorized operations due to improper validation of authentication tokens.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability affects IBM i operating systems version 7.6, 7.5, 7.4, and 7.3, representing a critical security flaw that enables remote attackers to exploit weak authentication token validation mechanisms. The issue stems from insufficient input sanitization and validation processes that govern how the system handles authentication tokens, creating pathways for unauthorized access and information disclosure. Attackers can leverage this weakness to bypass normal authentication procedures and gain elevated privileges within the system environment.
The technical implementation of this vulnerability resides in the authentication subsystem where token validation routines fail to properly verify the integrity and legitimacy of authentication credentials. This flaw allows malicious actors to craft or manipulate authentication tokens that would normally be rejected by the system's security controls. The improper validation mechanism creates a condition where tokens can be reused, forged, or manipulated without proper authorization checks, effectively weakening the entire authentication framework.
From an operational perspective, this vulnerability poses significant risks to organizations relying on IBM i systems for mission-critical operations. Remote attackers can exploit the weakness to access sensitive data, perform unauthorized administrative functions, and potentially establish persistent access within the network infrastructure. The impact extends beyond simple information disclosure to include potential system compromise and data integrity violations that could affect business continuity and regulatory compliance requirements.
The vulnerability aligns with CWE-287 which addresses improper authentication issues in software systems, specifically targeting weaknesses in authentication token handling and validation processes. From an ATT&CK framework perspective, this weakness maps to techniques involving credential access and privilege escalation, enabling adversaries to move laterally within the network and maintain persistent presence. Organizations should implement immediate mitigations including patching affected systems, strengthening authentication protocols, and monitoring for suspicious authentication patterns.
Security teams should prioritize this vulnerability as it represents a direct path to system compromise without requiring extensive reconnaissance or exploitation capabilities. The remote nature of the attack vector means that organizations cannot rely on network segmentation alone to protect against this threat. Mitigation strategies should include comprehensive system patching, implementation of additional authentication layers, and enhanced monitoring of authentication events to detect potential exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify systems that may be affected by similar token validation weaknesses in other components of the infrastructure.