{"action":"Upgrade mailfilter to 0.8.2-1 or later.","affected":[{"fixed":"0.8.2-1","introduced":"0"}],"component":"mailfilter","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["0.8.2-1"],"id":"tcs_01M5N8RZJ4ZJDTS7EMTCBC949P","modified_at":"2026-10-21T17:47:36.663583684Z","published_at":"2007-04-16T22:19:00Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2007-1558","https://security-tracker.debian.org/tracker/CVE-2007-1558"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2007-1558#Debian:13/mailfilter","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2007-1558"}],"summary":"The APOP protocol allows remote attackers to guess the first 3 characters of a password via man-in-the-middle (MITM) attacks that use crafted message IDs and MD5 collisions. NOTE: this design-level is"}