CRITICAL · 9.8

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 unde...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
IbmConcert>= 1.0.0, <= 3.0.0
LinuxLinux Kernel-

Related Weaknesses (CWE)

References

FAQ

What is CVE-2026-6721?

CVE-2026-6721 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 unde...

How severe is CVE-2026-6721?

CVE-2026-6721 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-6721?

Check the references section above for vendor advisories and patch information. Affected products include: Ibm Concert, Linux Linux Kernel.