Vulnerability Intelligence Report
SonicWall Email Security Improper Privilege Management Vulnerability
CVE-2021-20021
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
Privilege Escalation
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:83.43%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-269 ↗CWE-269: Improper Privilege Management
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| SonicWall | Email Security | 10.0.9 and earlier (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
83.425%
GitHub Advisory
Vulnerability Class
Privilege Escalation
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | SonicWall, Inc. · Vendor · USA |
| Reserved | 2020-12-17T00:00:00 |
| Published | 2021-04-09T17:50:14 |
| Last Updated | 2026-08-12T03:55:25 |
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