Security advisory

{
  "id": "1dbdde3cda7c0449e94e23a1433ff68ce0c00462e14c5fa6cc45ec5861774abd",
  "url": "https://osv.dev/vulnerability/CVE-2021-45769",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-45769",
    "summary": "A NULL pointer dereference in AcseConnection_parseMessage at src/mms/iso_acse/acse.c of libiec61850 v1.5.0 can lead to a segmentation fault or application crash.",
    "evidence": "osv:CVE-2021-45769",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-45769",
      "aliases": [
        "CVE-2021-45769"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mz-automation/libiec61850",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fcefc746fea286aeaa40d2f62240216da81c85e5"
                },
                {
                  "last_affected": "fcefc746fea286aeaa40d2f62240216da81c85e5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mz-automation:libiec61850:1.5.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.5.0"
                      },
                      {
                        "last_affected": "1.5.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.5.0",
            "v1.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45769.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:08.577426695Z",
      "provider": "osv",
      "references": [
        "https://github.com/mz-automation/libiec61850/issues/368"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-45769",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386942,
  "published_at": "2022-01-14T20:15:15.063+00:00"
}