Is CVE-2026-6721 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-6721?

CVE-2026-6721 has a CVSS v3 severity of CRITICAL (9.8).

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CVE-2026-6721

Description

IBM Concert 1.0.0 through 3.0.0 allows an unauthenticated remote attacker can supply specially crafted input that is incorporated into OS commands, resulting in arbitrary command execution on the underlying system. Successful exploitation allows remote code execution with the privileges of the affected application.