CVE-2021-20020

Global Management System vulnerability

CVSS

9.8

EPSS

3.7%

EPSS pct

89th

Exploited

No known

A command execution vulnerability in SonicWall GMS 9.3 allows a remote unauthenticated attacker to locally escalate privilege to root.

Affected vendor

Sonicwall

Affected product

Global Management System

CVSS vector

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

Weakness type (CWE)

CWE-287 — Improper Authentication

Published

2021-04-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2021-20020

Confirm whether Sonicwall Global Management System is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-20020.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-20020

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-20020 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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