{"id":"CVE-2021-33797","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-33797","generatedAt":"2026-10-28T06:35:04.412Z","title":"Buffer-overflow in jsdtoa.c in Artifex MuJS in versions 1.0.1 to 1.1.1.","description":"Buffer-overflow in jsdtoa.c in Artifex MuJS in versions 1.0.1 to 1.1.1. An integer overflow happens when js_strtod() reads in floating point exponent, which leads to a buffer overflow in the pointer *d.","published":"2023-04-17T22:15:08.000Z","lastModified":"2026-06-17T03:55:15.000Z","status":"Modified","sourceIdentifier":"patrick@puiterwijk.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-119","CWE-190"],"affected":["artifex/mujs"],"epss":{"score":0.00809,"percentile":0.56689,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.81%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/ccxvii/mujs/commit/833b6f1672b4f2991a63c4d05318f0b84ef4d550","tags":["Patch"],"source":"patrick@puiterwijk.org"},{"url":"https://github.com/ccxvii/mujs/issues/148","tags":["Issue Tracking","Third Party Advisory"],"source":"patrick@puiterwijk.org"},{"url":"https://github.com/ccxvii/mujs/commit/833b6f1672b4f2991a63c4d05318f0b84ef4d550","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ccxvii/mujs/issues/148","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ccxvii/mujs/issues/148","tags":["Issue Tracking","Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-33797","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."}