Is CVE-2026-18221 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18221?

CVE-2026-18221 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-18221

Description

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to gain unauthorized access due to improper validation of client-supplied authentication parameters.