An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.
| Reporter | Title | Published | Views | Family All 46 |
|---|---|---|---|---|
 | Astra Linux – vulnerability in mbedtls | 15 Oct 202615:53 | – | astralinux |
 | Mbed TLS SSL/TLS Certificate Validation | 11 Apr 202200:00 | – | bdu_fstec |
 | ARM mbed TLS trust management issue vulnerability | 23 Aug 202100:00 | – | cnnvd |
 | ARM mbed TLS Trust Management Issue Vulnerability | 25 Aug 202100:00 | – | cnvd |
 | CVE-2020-36478 | 23 Aug 202100:00 | – | cve |
 | CVE-2020-36478 | 23 Aug 202100:00 | – | cvelist |
 | [SECURITY] [DLA 2826-1] mbedtls security update | 23 Nov 202113:36 | – | debian |
| [SECURITY] [DLA 3249-1] mbedtls security update | 25 Dec 202223:33 | – | debian |
 | CVE-2020-36478 | 23 Aug 202100:00 | – | debiancve |
 | Debian DLA-2826-1 : mbedtls - LTS security update | 23 Nov 202100:00 | – | nessus |
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04 Sep 2025 05:05Current
7.3High risk
Vulners AI Score7.3
CVSS 25
CVSS 3.17.5
EPSS0.01102