CVE-2026-18193

Analyzed Analyzed - Analysis Complete

IBM i Remote Security Bypass Vulnerability

Publication date: 2026-08-13

Last updated on: 2026-08-19

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to bypass security restrictions due to improper validation of user-controlled addresses.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-13

Last Modified

2026-08-19

Generated

2026-09-03

AI Q&A

2026-08-14

EPSS Evaluated

2026-09-02

NVD

CVE-2026-18193

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	7.3
ibm	i	7.4
ibm	i	7.5
ibm	i	7.6

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

IBM i versions 7.6, 7.5, 7.4, and 7.3 have a vulnerability where a remote attacker can bypass security restrictions. This happens because the system does not properly validate user-controlled addresses, allowing unauthorized access or actions.

Detection Guidance

This vulnerability involves improper validation of user-controlled addresses in IBM i systems. Detection requires checking for unauthorized access attempts or unusual network traffic patterns targeting IBM i services. Review system logs for anomalies in address validation failures and monitor network traffic for suspicious connections to IBM i ports.

Impact Analysis

This vulnerability could allow attackers to bypass security controls, potentially leading to unauthorized access to sensitive data, system manipulation, or disruption of services. The high CVSS score (8.9) indicates significant risk.

Compliance Impact

This vulnerability allows remote attackers to bypass security restrictions due to improper validation of user-controlled addresses, which could lead to unauthorized access or data exposure. Such issues may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by enabling unauthorized access to sensitive information.

Mitigation Strategies

Apply IBM i PTFs or updates to address improper address validation. Monitor IBM i security bulletins for patches. Restrict remote access to trusted sources until patched.

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