CVE-2026-16929 in IBM
Summary
by MITRE • 08/13/2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to obtain sensitive information due to a buffer overflow.
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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, presenting a significant security risk that could be exploited by remote authenticated attackers. The flaw manifests as a buffer overflow condition that occurs when the system processes certain input data, potentially allowing an attacker with valid credentials to extract sensitive information from the system memory. This type of vulnerability falls under the CWE-121 buffer overflow category, which represents a fundamental weakness in memory management where data written beyond allocated buffer boundaries can overwrite adjacent memory locations. The attack vector requires authentication, meaning that an attacker must first establish valid credentials to the system before attempting exploitation, but once authenticated, they could potentially access confidential data including user credentials, system configurations, or proprietary information stored in memory.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could enable more sophisticated attacks such as privilege escalation or denial of service conditions. When an authenticated attacker successfully exploits the buffer overflow, they may be able to read sensitive memory locations that contain authentication tokens, encryption keys, or other critical system data. The vulnerability's presence in multiple IBM i versions indicates a widespread issue affecting legacy systems, which often present additional challenges for organizations attempting to maintain security while preserving business continuity. Organizations running these affected versions face potential exposure to data breaches, regulatory compliance violations, and operational disruptions that could affect mission-critical applications and services.
Mitigation strategies should include immediate application of available security patches from IBM, which typically address the buffer overflow by implementing proper input validation and memory boundary checks. System administrators should also implement network segmentation to limit access to privileged accounts and deploy intrusion detection systems to monitor for suspicious authentication patterns or unusual data access attempts. The vulnerability aligns with several ATT&CK techniques including credential access through legitimate credentials and privilege escalation via memory corruption. Organizations should conduct thorough vulnerability assessments to identify all affected systems and establish monitoring protocols to detect potential exploitation attempts. Additionally, implementing principle of least privilege access controls and regular security audits can help reduce the attack surface and minimize the potential impact if exploitation occurs. The incident underscores the importance of maintaining up-to-date security patches for enterprise operating systems, particularly those running legacy versions that may not receive full support from vendors.