{"id":"CVE-2026-6721","title":"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","summary":"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 exploitatio…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-78"],"vendor":"IBM","product":"Concert","affected":["Concert >= 1.0.0 <= 3.0.0"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T21:17:01.927","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-6721","references":[{"url":"https://www.ibm.com/support/pages/node/7288830","label":"psirt@us.ibm.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-23T21:33:13.532Z","slug":"CVE-2026-6721","body":"## Overview\n\nIBM 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}