{"id":"CVE-2025-55640","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-55640","generatedAt":"2026-10-27T23:45:27.191Z","title":"A heap buffer overflow in the stbl_AddSize function (isomedia/stbl_write.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.","description":"A heap buffer overflow in the stbl_AddSize function (isomedia/stbl_write.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.","published":"2026-10-16T19:16:56.000Z","lastModified":"2026-10-26T18:17:08.000Z","status":"Deferred","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"cwe":["CWE-122"],"affected":[],"epss":{"score":0.00223,"percentile":0.12794,"date":"2026-10-26","history":[{"date":"2026-10-17","score":0.00185,"percentile":0.07568}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-26T20:00:21.000Z","detail":{"from":null,"score":"5.5","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 5.5 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-10-16T19:16:56.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-16T19:16:56.243Z"},"summary":"New CVE, medium severity (CVSS 5.5)."}],"references":[{"url":"https://github.com/gpac/gpac/commit/321624f28d19a413449fd1718d1eb59037f8f7fc","source":"cve@mitre.org"},{"url":"https://github.com/gpac/gpac/issues/3261","source":"cve@mitre.org"},{"url":"https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/25/25_poc.mp4","source":"cve@mitre.org"},{"url":"https://infosec.exchange/@sigdevel/116769271709415444","source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/17/2","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-55640","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}