CVE-2026-6721 is a vulnerability in IBM Concert
Published on September 23, 2026
Multiple Vulnerabilities in IBM Concert Software
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.
Vulnerability Analysis
CVE-2026-6721 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-6721 has been classified to as a Shell injection vulnerability or weakness.
Products Associated with CVE-2026-6721
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Affected Versions
IBM Concert:- Version 1.0.0, <= 3.0.0 is affected.