AEGLIX vulnerability intelligence
CVE-2021-20021
CRITICAL · CVSS 9.8 · Analyzed
Published: 2021-04-09 · Updated: 2026-08-12 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-269
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- SonicWall · SonicWall Email Security
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2021-11-17
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6103
cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_5000_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_7000_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_5050_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:o:sonicwall:email_security_appliance_7050_firmware:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6105
cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:*
Before (exclusive): 10.0.9.6103
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.