CVE-2021-20022 is a critical vulnerability in SonicWall Email Security version 10.0.9.x that allows a post-authenticated attacker to upload arbitrary files to the remote host. With a CVSS score of 7.2 (HIGH), this flaw presents a significant risk, enabling high impact to confidentiality, integrity, and availability. The vulnerability is actively exploited in the wild, notably by the HelloKitty ransomware, and has garnered substantial community discussion and media coverage, despite a lack of public exploit code.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 10.0.9.6103CPE matchmatch criteria | cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:* | ||
< 10.0.9.6105CPE matchmatch criteria | cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:* | ||
< 10.0.9.6105CPE matchmatch criteria | cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:* | ||
< 10.0.9.6105CPE matchmatch criteria | cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:* | ||
< 10.0.9.6105CPE matchmatch criteria | cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.