{"cve":"CVE-2020-36421","nvd":{"published":"2021-07-19T17:15:11.133","modified":"2026-06-17T03:15:27.207","status":"Modified","description":"An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-203"],"references":["https://bugs.gentoo.org/730752","https://github.com/ARMmbed/mbedtls/issues/3394","https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7","https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0","https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html"],"products":["arm:mbed_tls","debian:debian_linux"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2020-36421","score":0.01539,"percentile":0.74891,"date":"2026-11-01"},"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."]}