{"id":"CVE-2025-1011","title":"A bug in WebAssembly code generation could have lead to a crash","summary":"A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"mozilla","product":"firefox","affected":["firefox < 128.7.0","firefox < 135.0","thunderbird < 135.0","thunderbird >= 128.0.1, < 128.7.0"],"patched":["firefox 135.0","thunderbird 128.7.0"],"published":"2025-02-04","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:10:01.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-1011","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1936454","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-07/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-09/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-10/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-11/","label":"security@mozilla.org"},{"url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00633,"epssPercentile":0.48397,"ingestedAt":"2026-09-30T19:21:07.223Z","slug":"CVE-2025-1011","body":"## Overview\n\nA bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.\n\n## Affected\n\n- `firefox < 128.7.0`\n- `firefox < 135.0`\n- `thunderbird < 135.0`\n- `thunderbird >= 128.0.1, < 128.7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 135.0`\n- `thunderbird 128.7.0`","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}