CVE-2026-6721

CRITICAL CVSS 3.1: 9.8 EPSS 1.45%
Updated Sep 28, 2026
Linux
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions 1.0.0 — 3.0.0
Type CWE-78 (OS Command Injection)
Vendor Linux
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Ibm Concert
cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*
1.0.0 <= 3.0.0
Linux Linux_Kernel
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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