CVE-2026-6721

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://www.ibm.com/support/pages/node/7288830 psirt@us.ibm.com

The full cvelistV5 record. Download as CVE-2026-6721.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:ibm:concert:1.0.0:*:*:*:*:*:*:*",
            "cpe:2.3:a:ibm:concert:3.0.0:*:*:*:*:*:*:*"
          ],
          "product": "Concert",
          "vendor": "IBM",
          "versions": [
            {
              "lessThanOrEqual": "3.0.0",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>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.</p>"
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T20:45:38.287Z",
        "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "shortName": "ibm"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://www.ibm.com/support/pages/node/7288830"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>IBM strongly recommends addressing the vulnerability now by upgrading to IBM Concert Software 3.0.1.1</p><p>Download IBM Concert Software 3.0.0 from Container software library section of IBM Entitled Registry (<a href=\"https://myibm.ibm.com/products-services/containerlibrary\" rel=\"noopener noreferrer nofollow\">ICR</a>) and follow\u00a0<a href=\"https://www.ibm.com/docs/en/concert?topic=installing-preparing-run-installs-from-private-container-registry\" rel=\"noopener noreferrer nofollow\">installation instructions</a>\u00a0depending on the type of deployment.</p>"
            }
          ],
          "value": "IBM strongly recommends addressing the vulnerability now by upgrading to IBM Concert Software 3.0.1.1\n\n\n\nDownload IBM Concert Software 3.0.0 from Container software library section of IBM Entitled Registry ( ICR https://myibm.ibm.com/products-services/containerlibrary ) and follow\u00a0 installation instructions https://www.ibm.com/docs/en/concert \u00a0depending on the type of deployment."
        }
      ],
      "title": "Multiple Vulnerabilities in IBM Concert Software"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
    "assignerShortName": "ibm",
    "cveId": "CVE-2026-6721",
    "datePublished": "2026-09-23T20:45:38.287Z",
    "dateReserved": "2026-04-20T19:32:11.770Z",
    "dateUpdated": "2026-09-23T20:45:38.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}