{"id":"CVE-2021-27799","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.","modified":"2026-03-14T10:53:03.199678Z","published":"2021-02-26T22:15:20.847Z","references":[{"type":"ADVISORY","url":"http://zint.org.uk/Manual.aspx?type=p&page=3"},{"type":"ADVISORY","url":"http://zint.org.uk/Manual.aspx?type=p&page=4"},{"type":"ADVISORY","url":"http://zint.org.uk/Manual.aspx?type=p&page=5"},{"type":"FIX","url":"https://sourceforge.net/p/zint/code/ci/7f8c8114f31c09a986597e0ba63a49f96150368a/"},{"type":"EVIDENCE","url":"https://sourceforge.net/p/zint/tickets/218/"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"2.9.1"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27799.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}