CVE-2021-20034
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to...
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
- Record
CVE-2021-20034- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:P - Weakness
- CWE-284, CWE-22
- Updated
- 2026-11-02
CVE List No score
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
- Record
CVE-2021-20034- Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2021-7497 No score
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
- Record
EUVD-2021-7497- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vfqg-fwg4-f3vx
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to...
An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.
- Record
GHSA-vfqg-fwg4-f3vx- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - Weakness
- CWE-22, CWE-269
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | SonicWall SMA 10.2.1.0-17sv - Password Reset | 2021-10-20 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20034 is a critical vulnerability (CVSS 9.1) in Sonicwall Sma100, published September 27, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.8%, the 99th percentile. No source names a fixed version.