{"cve":"CVE-2021-20309","nvd":{"published":"2021-05-11T23:15:08.720","modified":"2026-06-17T03:33:38.900","status":"Modified","description":"A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-369"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1946722","https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html","https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html","https://bugzilla.redhat.com/show_bug.cgi?id=1946722","https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html"],"products":["debian:debian_linux","imagemagick:imagemagick"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-20309","score":0.02315,"percentile":0.83421,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}