CVE-2026-6721

Received Received - Intake

Remote Code Execution in IBM Concert

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: IBM Corporation

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 Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-23

Last Modified

2026-09-23

Generated

2026-09-24

AI Q&A

2026-09-24

EPSS Evaluated

N/A

NVD

CVE-2026-6721

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	concert	From 1.0.0 (inc) to 3.0.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product 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.

Attack-Flow Graph

Executive Summary

This vulnerability in IBM Concert 1.0.0 through 3.0.0 allows an unauthenticated remote attacker to execute arbitrary OS commands by supplying specially crafted input. Successful exploitation results in remote code execution with the privileges of the affected application.

Impact Analysis

An attacker could gain full control over the system running IBM Concert, potentially accessing sensitive data, installing malware, or disrupting services. The high CVSS score indicates severe impact with no authentication required.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access control. Organizations may face legal penalties and reputational damage.

Mitigation Strategies

Update IBM Concert to the latest version beyond 3.0.0 to address the command injection flaw. If an update is unavailable, restrict network access to the application and monitor for suspicious activity. Disable unnecessary services and apply input validation to block crafted inputs.

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