CVE-2026-17487: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Description
IBM i versions 7.3, 7.4, 7.5, and 7.6 contain a vulnerability that allows remote attackers to enumerate user profiles by observing distinct error codes returned during the sign-on process. This exposure of sensitive information could aid attackers in further reconnaissance but does not directly impact system integrity or availability.
CVSS v3.1
Score 5.3medium
Affected software
IBM
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-17487 is an information disclosure vulnerability in IBM i versions 7.3 through 7.6. The flaw arises because the sign-on process returns distinct error codes that reveal whether user profiles exist, enabling remote attackers to enumerate valid user accounts. The vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The CVSS v3.1 base score is 5.3, reflecting a medium severity with network attack vector, low attack complexity, no privileges or user interaction required, and confidentiality impact limited to information disclosure only.
Potential Impact
The vulnerability allows remote attackers to enumerate valid user profiles on affected IBM i systems by analyzing error codes during sign-on attempts. This information disclosure could facilitate targeted attacks or social engineering but does not directly allow system compromise, data modification, or denial of service.
Mitigation Recommendations
No patch or official remediation details are currently provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, organizations should monitor for unusual sign-on attempts and consider restricting access to the sign-on interface where feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-25T23:39:42.711Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acd71e72cdf04f656e905c3
Added to database: 10/12/2026, 23:48:55 UTC
Last enriched: 10/13/2026, 00:04:30 UTC
Last updated: 10/13/2026, 00:08:16 UTC
Views: 5
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