Unrestricted file upload in SonicWall Email Security
Priority CRITICAL 91Exploited in the wildCWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-434.
Summary
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.
Why it matters now
Exploitation Active In CISA KEV since 2021-11-03CISA due date 2021-11-17Known ransomware use
EPSS 0.16639 97th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SonicWall | Email Security | up to 10.0.9 | — | No fix listed | CNA |
- Email Security VendorSonicWall Affected up to 10.0.9 Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:* | before 10.0.9.6103 | Vulnerable | SonicWall |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_9000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_3300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_4300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_8300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
- cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:* Versions before 10.0.9.6103 Vulnerable ·SonicWall
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:o:sonicwall:email_security_appliance_9000_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_9000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_3300_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_3300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_4300_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_4300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_8300_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_8300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:sonicwall:email_security_appliance_5000_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_5000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_7000_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_7000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_5050_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_5050:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:o:sonicwall:email_security_appliance_7050_firmware:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:h:sonicwall:email_security_appliance_7050:-:*:*:*:*:*:*:* | not specified by NVD | Running on | SonicWall |
| cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:* | before 10.0.9.6105 | Vulnerable | SonicWall |
| cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:* | before 10.0.9.6103 | Vulnerable | SonicWall |
- cpe:2.3:o:sonicwall:email_security_appliance_5000_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_7000_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_7000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_5050_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_5050:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:o:sonicwall:email_security_appliance_7050_firmware:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:h:sonicwall:email_security_appliance_7050:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·SonicWall
- cpe:2.3:a:sonicwall:email_security_virtual_appliance:*:*:*:*:*:*:*:* Versions before 10.0.9.6105 Vulnerable ·SonicWall
- cpe:2.3:a:sonicwall:hosted_email_security:*:*:*:*:*:*:*:* Versions before 10.0.9.6103 Vulnerable ·SonicWall
Remediation
No fixed version listed by the sources yet.
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2021-20022
- 2026-10-03 Alias added: GHSA-5f56-r8q7-xv26
References
More SonicWall Email Security vulnerabilities
- TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
- TI-2021-03342 Improper privilege management in SonicWall Email Security KEVCVSS 3.1CRITICAL 9.8
- TI-2021-20393 Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack KEVCVSS 3.1CRITICAL 9.0
- TI-2021-03344 Path traversal in SonicWall Email Security KEVCVSS 3.1MEDIUM 4.9
- TI-2021-20437 Apache Log4j2 does not always protect from infinite recursion in lookup evaluation CVSS 3.1MEDIUM 5.9
- TI-2018-02664 Observable discrepancy in Intel Multiple CVSS 3.1MEDIUM 5.5
Sources
- CVE-2021-20022 · CVE Program
- CVE-2021-20022 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-5f56-r8q7-xv26 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences