IBM i 7.3-7.6 Remote User Enumeration via Sign-On Error Codes
CVE-2026-17487 Published on October 12, 2026
IBM i is Information Disclosure
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote attacker to enumerate user profiles due to the return of distinct error codes during the sign-on process.
Vulnerability Analysis
CVE-2026-17487 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2026-17487 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-17487
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Affected Versions
IBM i:- Version 7.6 is affected.
- Version 7.5 is affected.
- Version 7.4 is affected.
- Version 7.3 is affected.