CVE-2026-6721 IBM Concert - Command Injection

IBM Concert 1.0.0 through 3.0.0 contains a command injection caused by incorporation of specially crafted input into OS commands, letting unauthenticated remote attackers execute arbitrary commands, exploit requires no authentication.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
1.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-78

Vendor fix

Update to the latest version beyond 3.0.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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