CVE-2026-18318

5.3Medium

Published 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash

5.3Medium

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Limited impact
Weakness: CWE-307

Impact

Remote, unauthenticated attackers can brute-force user accounts to harvest valid credentials. They only need network connectivity to the targeted IBM i service.

Root cause

Improper authentication controls fail to restrict or rate-limit repeated login attempts.

Affected systems

IBM i 7.3, 7.4, 7.5, and 7.6

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Fix & remediation

Apply the appropriate IBM PTF patches referenced in IBM advisory 7290096. If patching must wait, restrict network access to IBM i authentication services via firewall or IP filtering.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote attacker to perform brute-force attacks to obtain credentials due to improper authentication.

References

https://www.ibm.com/support/pages/node/7290096PatchVendor Advisory

Source: nvd.nist.gov/vuln/detail/CVE-2026-18318