CVE-2026-17445

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Remote Authentication Bypass in IBM i

Publication date: 2026-08-12

Last updated on: 2026-08-12

Assigner: IBM Corporation

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due to improper validation of an attacker-supplied user profile name.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-12

Last Modified

2026-08-12

Generated

2026-08-13

AI Q&A

2026-08-13

EPSS Evaluated

N/A

NVD

CVE-2026-17445

EUVD

EUVD-2026-57519

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-250	The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.

Attack-Flow Graph

Executive Summary

IBM i 7.6, 7.5, 7.4, and 7.3 are vulnerable to a security bypass due to improper validation of user profile names in the Line Printer Daemon (LPD). A remote authenticated attacker can exploit this flaw to bypass security restrictions.

Detection Guidance

To detect this vulnerability, check if your IBM i system is running affected versions (7.3, 7.4, 7.5, or 7.6) and verify if the Line Printer Daemon (LPD) is enabled. Review installed PTFs to confirm if the fixes (SJ10878, SJ10917, SJ10934, SJ10935) are applied. Monitor network traffic for unauthorized access attempts targeting user profile validation.

Impact Analysis

An attacker could gain unauthorized access or elevate privileges by bypassing security controls. This may lead to data breaches, unauthorized system changes, or other malicious activities depending on the attacker's goals.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements such as GDPR (data protection) or HIPAA (health information privacy). Organizations may face penalties or legal consequences if exploited.

Mitigation Strategies

Apply the provided PTFs immediately: SJ10878 for IBM i 7.6, SJ10917 for 7.5, SJ10934 for 7.4, and SJ10935 for 7.3. If running unsupported versions, upgrade to a supported release. Disable the Line Printer Daemon (LPD) if not required to reduce attack surface.

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