AUGUST 4, 2026
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Case File

CVE-2021-43399

HIGH · CVSS 7.5 EPSS 1.37%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-12-08 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. See the original NVD description below for full technical details.

CVE
CVE-2021-43399
Severity
HIGH
CVSS
7.5
EPSS
1.37%

Original NVD Description

The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.

Related CVEs

Other vulnerabilities affecting the same vendor(s)