CVE-2026-17223

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Buffer Overflow in IBM i

Publication date: 2026-08-13

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 code due to a buffer overflow.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-13

Last Modified

2026-08-13

Generated

2026-08-14

AI Q&A

2026-08-14

EPSS Evaluated

N/A

NVD

CVE-2026-17223

EUVD

EUVD-2026-58238

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-787	The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer overflow in IBM i versions 7.6, 7.5, 7.4, and 7.3. A remote authenticated attacker could exploit it to execute arbitrary code on the affected system.

Impact Analysis

An attacker could gain control of the system, steal data, install malware, or disrupt operations. The high CVSS score (8.8) indicates significant risk due to potential for confidentiality, integrity, and availability breaches.

Mitigation Strategies

Apply IBM i PTFs or updates provided by IBM to address the buffer overflow vulnerability. Ensure only trusted users have remote access and monitor for unusual activity.

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