CVE-2026-17099 in IBM
Summary
by MITRE • 08/14/2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to obtain sensitive information due to improper authentication.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability affects IBM i operating systems version 7.6, 7.5, 7.4, and 7.3, presenting a significant security risk through improper authentication mechanisms that could enable remote attackers to access sensitive information. The flaw stems from inadequate verification processes that fail to properly authenticate users attempting to access system resources remotely. According to CWE-287, this represents an improper authentication issue where the system does not adequately verify the identity of users or systems attempting to establish connections, creating potential entry points for unauthorized access.
The technical implementation of this vulnerability allows attackers to bypass normal authentication procedures without requiring valid credentials or proper authorization tokens. This weakness typically manifests when the system accepts requests from unauthenticated sources or fails to validate the authenticity of connection attempts properly. Attackers can exploit this by crafting malicious requests that circumvent standard security controls, potentially gaining access to confidential data, system configurations, or other sensitive resources within the IBM i environment.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates opportunities for broader compromise of the affected systems. Remote attackers could leverage this weakness to escalate privileges, conduct man-in-the-middle attacks, or establish persistent access points within network environments. The vulnerability affects multiple versions of IBM i, indicating a widespread issue that requires immediate attention across affected deployments. Organizations utilizing these operating system versions face increased risk of data breaches, regulatory compliance violations, and potential system compromise.
Security professionals should implement immediate mitigations including updating to patched versions of IBM i operating systems, reviewing authentication configurations, and monitoring for unauthorized access attempts. The vulnerability aligns with ATT&CK technique T1078 which covers legitimate credentials usage, where adversaries may exploit weak authentication to gain access to systems. Additional protective measures include implementing network segmentation, deploying intrusion detection systems, and conducting regular security assessments to identify potential exploitation vectors. Organizations should also review their access control policies and ensure proper implementation of multi-factor authentication mechanisms to reduce the risk associated with this authentication weakness.
The root cause analysis reveals that this vulnerability represents a failure in the system's credential validation processes, potentially related to improper session management or weak cryptographic implementations. System administrators should verify that all authentication modules are properly configured and regularly updated according to IBM security advisories. Organizations must also consider implementing comprehensive monitoring solutions that can detect anomalous authentication patterns and alert security teams to potential exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to ensure the effectiveness of implemented controls against this and similar authentication-related threats.
This vulnerability demonstrates the critical importance of robust authentication mechanisms in enterprise systems, particularly in environments where sensitive data processing occurs. The impact extends beyond immediate information disclosure to potentially enable more sophisticated attacks including privilege escalation, lateral movement within networks, and persistent access establishment. Given that IBM i systems often handle mission-critical applications and financial data, the potential consequences of unauthorized access through this vulnerability could be severe, affecting business continuity, regulatory compliance, and customer trust. Organizations must prioritize remediation efforts while maintaining situational awareness regarding similar authentication weaknesses that may exist in related system components or third-party integrations.