CVE-2021-20021
SonicWall Email Security Improper Privilege Management Vulnerability
Summary
SonicWall Email Security contains an improper privilege management vulnerability that allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20022 and CVE-2021-20023 to achieve privilege escalation.
Affected software
Vendor: SonicWall · Product: SonicWall Email Security
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in SonicWall
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2019-7481 | SonicWall SMA100 SQL Injection Vulnerability | 99.9% | Yes |
| CVE-2021-20038 | SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability | 99.9% | Yes |
| CVE-2024-53704 | SonicWall SonicOS SSLVPN Improper Authentication Vulnerability | 95.1% | Yes |
| CVE-2026-15409 | SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability | 78.4% | Yes |
| CVE-2026-15410 | SonicWall SMA1000 Appliances Code Injection Vulnerability | 76.3% | Yes |
| CVE-2023-44221 | SonicWall SMA100 Appliances OS Command Injection Vulnerability | 74.9% | Yes |
| CVE-2021-20023 | SonicWall Email Security Path Traversal Vulnerability | 50.2% | Yes |
| CVE-2021-20016 | SonicWall SSLVPN SMA100 SQL Injection Vulnerability | 37.0% | Yes |
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