{"id":"CVE-2025-0241","title":"When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash","summary":"When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-401"],"vendor":"mozilla","product":"firefox","affected":["firefox < 128.6.0","firefox < 134.0","thunderbird < 128.6.0","thunderbird >= 129.0, < 134.0"],"patched":["firefox 134.0","thunderbird 134.0"],"published":"2025-01-07","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:10:01.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-0241","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1933023","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-01/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-02/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-04/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-05/","label":"security@mozilla.org"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00739,"epssPercentile":0.52834,"ingestedAt":"2026-09-30T19:21:07.218Z","slug":"CVE-2025-0241","body":"## Overview\n\nWhen segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.\n\n## Affected\n\n- `firefox < 128.6.0`\n- `firefox < 134.0`\n- `thunderbird < 128.6.0`\n- `thunderbird >= 129.0, < 134.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 134.0`\n- `thunderbird 134.0`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}