{"id":"CVE-2026-103679","title":"A flaw was found in tnef","summary":"A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory manag…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-416"],"vendor":"tnef_project","product":"tnef","affected":["tnef <= 1.4.18"],"published":"2026-10-01","updated":"2026-10-05","sourceUpdated":"2026-10-05T14:05:23.933","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103679","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-103679","label":"patrick@puiterwijk.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544477","label":"patrick@puiterwijk.org"},{"url":"https://github.com/verdammelt/tnef","label":"patrick@puiterwijk.org"}],"tags":["nvd","cve.org"],"epss":0.00279,"epssPercentile":0.20293,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-01T14:59:32.309151Z"},"ingestedAt":"2026-10-01T12:43:54.810Z","slug":"CVE-2026-103679","body":"## Overview\n\nA flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).\n\n## Affected\n\n- `tnef <= 1.4.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}