{"action":"Upgrade libytnef to 1.9.3-3 or later.","affected":[{"fixed":"1.9.3-3","introduced":"0"}],"component":"libytnef","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1.9.3-3"],"id":"tcs_01M5NFR58JTBP5YYYHZXJCYA3E","modified_at":"2026-10-23T18:02:30.316258468Z","published_at":"2021-03-04T22:15:14.657Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-3404","https://security-tracker.debian.org/tracker/CVE-2021-3404"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-3404#Debian:13/libytnef","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-3404"}],"summary":"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 cr"}