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Case File

CVE-2021-20042

CRITICAL · CVSS 9.8 EPSS 2.66%

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

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It may be remotely exploitable.

CVE
CVE-2021-20042
Severity
CRITICAL
CVSS
9.8
EPSS
2.66%

Original NVD Description

An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

Related CVEs

Other vulnerabilities affecting the same vendor(s)