CVE-2021-20021 — CRITICAL (9.8)

Q: What is CVE-2021-20021?

CVE-2021-20021 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.

Q: How severe is CVE-2021-20021?

CVE-2021-20021 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2021-20021?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Email Security, Microsoft Windows, Sonicwall Email Security Appliance 9000 Firmware, Sonicwall Email Security Appliance 9000, Sonicwall Email Security Appliance 3300 Firmware.

Vulnerability Description

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.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Sonicwall	Email Security	< 10.0.9.6103
Microsoft	Windows	-
Sonicwall	Email Security Appliance 9000 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 9000	-
Sonicwall	Email Security Appliance 3300 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 3300	-
Sonicwall	Email Security Appliance 4300 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 4300	-
Sonicwall	Email Security Appliance 8300 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 8300	-
Sonicwall	Email Security Appliance 5000 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 5000	-
Sonicwall	Email Security Appliance 7000 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 7000	-
Sonicwall	Email Security Appliance 5050 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 5050	-
Sonicwall	Email Security Appliance 7050 Firmware	< 10.0.9.6105
Sonicwall	Email Security Appliance 7050	-
Sonicwall	Email Security Virtual Appliance	< 10.0.9.6105
Sonicwall	Hosted Email Security	< 10.0.9.6103

Related Weaknesses (CWE)

CWE-269

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0007Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0007Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-US Government Resource

FAQ

What is CVE-2021-20021?

CVE-2021-20021 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.

How severe is CVE-2021-20021?

CVE-2021-20021 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-20021?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Email Security, Microsoft Windows, Sonicwall Email Security Appliance 9000 Firmware, Sonicwall Email Security Appliance 9000, Sonicwall Email Security Appliance 3300 Firmware.