A Denial of Service vulnerability exists in mbed TLS 3.0.0 and earlier in the mbedtls_pkcs12_derivation function when an input password's length is 0.
{
"sources": [
{
"modified": "2026-06-17T04:11:14.677Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-43666",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43666",
"published": "2022-03-24T18:15:08.333Z",
"id": "CVE-2021-43666",
"database_specific": {
"status": "Modified"
},
"imported": "2026-07-17T20:46:07.244Z"
}
],
"license": "CC-BY-4.0"
}