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VulnerabilityPublished Updated

CVE-2026-17488: IBM i · Improper Authentication

Source CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium.

Data as of 26 Oct 2026, 14:18 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBMAffected
  • 7.3 – 7.6
4 affected builds
Fixed in–

CPE configurations (4)

  • 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:*:*:*:*:*:*:*

AI-suggested

Until official fixes are available, monitor IBM's security advisories for updates and consider restricting remote authenticated access where feasible.

Description

IBM i versions 7.3, 7.4, 7.5, and 7.6 contain an improper authentication vulnerability that could allow a remote authenticated attacker to bypass security restrictions. The vulnerability is identified as CWE-287 and has a medium severity with a CVSS score of 4.3. No specific exploit details or active exploitation in the wild have been reported. No patch or remediation information is provided in the available data.

References

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