Vulnerability Intelligence Report
SonicWall Email Security Path Traversal Vulnerability
CVE-2021-20023
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.
CISA KEV
SSVC: Active Exploitation
Automatable
Path Traversal
CVSS Base Score
4.9
MEDIUM
Exploitability:1.3
Impact Score:3.6
EPSS Probability:50.23%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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
EPSS Score
50.234%
GitHub Advisory
Vulnerability Class
Path Traversal
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | SonicWall, Inc. · Vendor · USA |
| Reserved | 2020-12-17T00:00:00 |
| Published | 2021-04-20T11:55:13 |
| Last Updated | 2026-08-12T03:55:23 |
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