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CRITICAL

CVE-2026-6721

CVSS v3

9.8

CRITICAL

EPSS Score

1.4 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

CVSS v3 Vector
3.1
Published
2026-09-23
Last Modified
2026-09-24

Frequently asked questions

What is CVE-2026-6721?

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.

Is CVE-2026-6721 actively exploited?

Active exploitation of CVE-2026-6721 has not been confirmed. The EPSS score is 1.4%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-6721?

CVE-2026-6721 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string 3.1.

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