{"cve":"CVE-2020-12401","nvd":{"published":"2020-10-08T14:15:11.250","modified":"2026-08-19T15:29:21.807","status":"Modified","description":"During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":4.7},"cwes":["CWE-203"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1631573","https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html","https://www.mozilla.org/security/advisories/mfsa2020-36/","https://www.mozilla.org/security/advisories/mfsa2020-39/","https://bugzilla.mozilla.org/show_bug.cgi?id=1631573"],"products":["mozilla:firefox","mozilla:firefox_mobile"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-12401","score":0.00326,"percentile":0.25672,"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."]}