Information disclosure in SonicWall SonicOS
Priority LOW 36CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
A vulnerability in SonicOS where the HTTP server response leaks partial memory by sending a crafted HTTP request, this can potentially lead to an internal sensitive data disclosure vulnerability.
Why it matters now
EPSS 0.01414 72nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SonicWall | SonicOS | SonicOS - 6.5.4.7-83n; SonicOSv - 6.5.4.4-44v-21-955; SonicOS - 6.5.1.12-3n; SonicOS - 6.0.5.3-94o; SonicOS - 7.0.0-R713 and earlier; SonicOS - 7.0.1-R1036 and earlier; SonicOS - 7.0.0.375 and earlier | — | No fix listed | CNA |
- SonicOS VendorSonicWall Affected SonicOS - 6.5.4.7-83n; SonicOSv - 6.5.4.4-44v-21-955; SonicOS - 6.5.1.12-3n; SonicOS - 6.0.5.3-94o; SonicOS - 7.0.0-R713 and earlier; SonicOS - 7.0.1-R1036 and earlier; SonicOS - 7.0.0.375 and earlier Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | 7.0.0 to before 7.0.0.376; 7.0.1 to before 7.0.1-r1036 | Vulnerable | SonicWall |
| cpe:2.3:o:sonicwall:sonicos:6.0.5.3-94o:*:*:*:*:*:*:* | 6.0.5.3-94o | Vulnerable | SonicWall |
| cpe:2.3:o:sonicwall:sonicos:6.5.1.12-3n:*:*:*:*:*:*:* | 6.5.1.12-3n | Vulnerable | SonicWall |
| cpe:2.3:o:sonicwall:sonicos:6.5.4.7-83n:*:*:*:*:*:*:* | 6.5.4.7-83n | Vulnerable | SonicWall |
| cpe:2.3:o:sonicwall:sonicosv:6.5.4.4-44v-21-955:*:*:*:*:*:*:* | 6.5.4.4-44v-21-955 | Vulnerable | SonicWall |
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.0.376; 7.0.1 to before 7.0.1-r1036 Vulnerable ·SonicWall
- cpe:2.3:o:sonicwall:sonicos:6.0.5.3-94o:*:*:*:*:*:*:* Versions 6.0.5.3-94o Vulnerable ·SonicWall
- cpe:2.3:o:sonicwall:sonicos:6.5.1.12-3n:*:*:*:*:*:*:* Versions 6.5.1.12-3n Vulnerable ·SonicWall
- cpe:2.3:o:sonicwall:sonicos:6.5.4.7-83n:*:*:*:*:*:*:* Versions 6.5.4.7-83n Vulnerable ·SonicWall
- cpe:2.3:o:sonicwall:sonicosv:6.5.4.4-44v-21-955:*:*:*:*:*:*:* Versions 6.5.4.4-44v-21-955 Vulnerable ·SonicWall
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20019
- 2026-10-03 Alias added: GHSA-32x4-2mw2-5hjv
References
More SonicWall Sonicos vulnerabilities
- TI-2020-04229 Buffer overflow in SonicWall SonicOS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-35902 Improper authentication in SonicWall SonicOS KEVCVSS 3.1CRITICAL 9.8
- TI-2024-27152 Improper access control in SonicWall SonicOS KEVCVSS 3.1CRITICAL 9.8
- TI-2022-06604 Stack-based buffer overflow in SonicWall SonicOS CVSS 3.1CRITICAL 9.8
- TI-2019-09143 Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4). CVSS 3.1CRITICAL 9.8
- TI-2019-09145 Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component. CVSS 3.1HIGH 8.8
Sources
- CVE-2021-20019 · CVE Program
- CVE-2021-20019 · NVD
- FIRST EPSS
- GHSA-32x4-2mw2-5hjv · GitHub Advisory Database · CC BY 4.0
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