{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "150146e3058a493d5accf6d5f76ff450468d7bd7"
            }
          ],
          "repo": "https://github.com/eipstackgroup/opener",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read.",
  "id": "CVE-2021-21777",
  "modified": "2026-03-13T21:57:36.045921136Z",
  "published": "2021-06-17T11:15:07.707Z",
  "references": [
    {
      "type": "EVIDENCE",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}