{"cve":"CVE-2020-36475","nvd":{"published":"2021-08-23T02:15:06.930","modified":"2026-06-17T03:15:34.277","status":"Modified","description":"An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs.","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-131"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf","https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9","https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0","https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18","https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html"],"products":["arm:mbed_tls","debian:debian_linux","siemens:logo\\!_cmr2020_firmware","siemens:logo\\!_cmr2040_firmware","siemens:simatic_rtu3000c_firmware","siemens:simatic_rtu3030c_firmware","siemens:simatic_rtu3031c_firmware","siemens:simatic_rtu3041c_firmware"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2020-36475","score":0.01917,"percentile":0.79866,"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."]}