{"id":"CVE-2021-3404","details":"In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.","modified":"2026-04-16T04:40:55.209624419Z","published":"2021-03-04T22:15:14.657Z","references":[{"type":"REPORT","url":"https://github.com/Yeraze/ytnef/issues/86"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1926965"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yeraze/ytnef","events":[{"introduced":"0"},{"last_affected":"d9b2f01d125c9b178f7a00ec397cc2a9f258e8e1"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.9.3"}]}}],"versions":["v1.7","v1.8","v1.9","v1.9.1","v1.9.1-2","v1.9.2","v1.9.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3404.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"33"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}