CVE-2021-20021

critical · 9.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply updates per vendor instructions.

Added 2021-11-03Remediation due 2021-11-17

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8

CVSS

83.4%

EPSS (exploit prob.)

100th

EPSS percentile

2021-04-09

Published

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

Weaknesses

CWE-269

Affected products

Vendor	Product	Affected versions
sonicwall	email_security	< 10.0.9.6103
microsoft	windows	all versions
sonicwall	email_security_appliance_9000_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_9000	all versions
sonicwall	email_security_appliance_3300_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_3300	all versions
sonicwall	email_security_appliance_4300_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_4300	all versions
sonicwall	email_security_appliance_8300_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_8300	all versions
sonicwall	email_security_appliance_5000_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_5000	all versions
sonicwall	email_security_appliance_7000_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_7000	all versions
sonicwall	email_security_appliance_5050_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_5050	all versions
sonicwall	email_security_appliance_7050_firmware	< 10.0.9.6105
sonicwall	email_security_appliance_7050	all versions
sonicwall	email_security_virtual_appliance	< 10.0.9.6105
sonicwall	hosted_email_security	< 10.0.9.6103

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-20021