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TI-2026-71460 Aliases CVE-2026-17487GHSA-5frj-2gjj-w54h

IBM i sign-on errors let remote attackers enumerate user profiles

Priority LOW 30CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

IBM i 7.3, 7.4, 7.5, and 7.6 are affected. The sign-on process returns distinct error codes, which exposes which user profiles exist (CWE-200). A remote attacker can exploit this without authentication or user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0024 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMi7.6; 7.5; 7.4; 7.3—No fix listedCNA
  • i VendorIBM Affected 7.6; 7.5; 7.4; 7.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:ibm:i:*:*:*:*:*:*:*:*7.3 – 7.6VulnerableIBM
  • cpe:2.3:o:ibm:i:*:*:*:*:*:*:*:* Versions 7.3 – 7.6 Vulnerable ·IBM

Remediation

The sources list no fixed version for IBM i.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    IBM i — ibm.com/support/pages/node/7290096

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-71461 Improper authentication in IBM i allows credential brute-forcingPriority LOW 30
    • TI-2026-71459 Improper access control in IBM i enables local denial of servicePriority LOW 30
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-17487
  2. 2026-10-13 Alias added: GHSA-5frj-2gjj-w54h
  3. 2026-10-13 CISA SSVC decision points changed

References

Patch 1

  • TI-2024-18115 IBM i privilege escalation CVSS 3.1HIGH 7.8
  • TI-2026-14283 IBM i is Affected By Remote Code Execution Vulnerability in Line Printer Daemon [] CVSS 3.1CRITICAL 9.8
  • TI-2023-14729 IBM i command execution CVSS 3.1CRITICAL 9.8
  • TI-2026-14279 IBM i is Affected By Denial of Service Vulnerabilities in NFS [, ] CVSS 3.1CRITICAL 9.1
  • TI-2026-14196 IBM i is Affected By Denial of Service Vulnerabilities in NFS [, ] CVSS 3.1CRITICAL 9.1
  • TI-2026-13994 IBM i is Affected By Multiple Vulnerabilities in Simple Mail Transfer Protocol CVSS 3.1CRITICAL 9.1
See all 207 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences