CVE-2021-43666 | Vulnetix

CVE-2021-43666 PUBLISHED CVSS 7.5 HIGH

Reported by mitre · Published March 24, 2022

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.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
mbed_tls	arm	3.0.0

Risk scores

CVSS 3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Vendor	Product	Versions
n/a	n/a	n/a
n/a	n/a	*

Timeline

Mar 24, 2022 CVE Published
Mar 25, 2022 EPSS Score (30 in total, the first dated here)
Dec 2, 2025 CVE Updated
Jun 1, 2026 Security Advisory
Jul 17, 2026 Coalition ESS Score

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2021-43666
vulnetix vdb fixes CVE-2021-43666

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curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2021-43666/fixes/registry"

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References

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