{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2.9.1"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "ean_leading_zeroes in backend/upcean.c in Zint Barcode Generator 2.9.1 has a stack-based buffer overflow that is reachable from the C API through an application that includes the Zint Barcode Generator library code.",
  "id": "CVE-2021-27799",
  "modified": "2026-03-13T21:53:11.218312733Z",
  "published": "2021-02-26T22:15:20.847Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://zint.org.uk/Manual.aspx?type=p\u0026page=3"
    },
    {
      "type": "ADVISORY",
      "url": "http://zint.org.uk/Manual.aspx?type=p\u0026page=4"
    },
    {
      "type": "ADVISORY",
      "url": "http://zint.org.uk/Manual.aspx?type=p\u0026page=5"
    },
    {
      "type": "FIX",
      "url": "https://sourceforge.net/p/zint/code/ci/7f8c8114f31c09a986597e0ba63a49f96150368a/"
    },
    {
      "type": "EVIDENCE",
      "url": "https://sourceforge.net/p/zint/tickets/218/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}