CVE-2026-18235

Analyzed Analyzed - Analysis Complete

Remote Command Execution in IBM i

Publication date: 2026-08-12

Last updated on: 2026-08-13

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to execute arbitrary Control Language commands due to insufficient input validation.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-12

Last Modified

2026-08-13

Generated

2026-09-02

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-31

NVD

CVE-2026-18235

EUVD

EUVD-2026-57363

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	i	From 7.3 (inc) to 7.6 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability allows a remote authenticated attacker to execute arbitrary Control Language commands on IBM i systems due to insufficient input validation. It affects IBM i versions 7.6, 7.5, 7.4, and 7.3.

Detection Guidance

This vulnerability allows remote authenticated attackers to execute arbitrary Control Language commands due to insufficient input validation in IBM i systems. Detection requires checking for unauthorized command execution attempts or unusual activity in system logs. Review command history and audit logs for suspicious Control Language commands. No specific commands are provided in the available context.

Impact Analysis

An attacker could gain unauthorized access to execute commands, potentially leading to data breaches, system compromise, or unauthorized modifications. The impact severity is high due to the combination of confidentiality, integrity, and availability risks.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, and other regulations by enabling unauthorized data access or modification. Organizations may face penalties for failing to protect sensitive data adequately.

Mitigation Strategies

Apply IBM i PTFs or updates to address insufficient input validation. Restrict remote authenticated user access to only necessary commands. Monitor for unusual Control Language command execution patterns.

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