CVE-2021-20021 - Vulnerability Details - OpenCVE

A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is in the KEV database since Nov. 3, 2021.

The EPSS score is 0.91866.

Exploitation active

Automatable yes

Technical Impact total

Vendors	Products
Sonicwall	Email Security Hosted Email Security

Configuration 1 [-]

OR	cpe:2.3:a:sonicwall:email_security::::::::
	cpe:2.3:a:sonicwall:hosted_email_security::::::::

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0007
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20021

History

Wed, 22 Oct 2025 00:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20021

Tue, 21 Oct 2025 20:30:00 +0000

Type	Values Removed	Values Added
References	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20021

Tue, 21 Oct 2025 19:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20021

Thu, 06 Feb 2025 20:15:00 +0000

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2021-11-03'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: sonicwall

Published: 2021-04-09T17:50:14.000Z

Updated: 2025-10-21T23:25:49.537Z

Reserved: 2020-12-17T00:00:00.000Z

Link: CVE-2021-20021

Vulnrichment

Updated: 2024-08-03T17:30:07.089Z

NVD

Status : Modified

Published: 2021-04-09T18:15:13.380

Modified: 2025-10-22T00:17:18.770

Link: CVE-2021-20021

Redhat

No data.

OpenCVE Enrichment

No data.

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