---
title: "CVE-2021-20034: Improper Access Control | CubePath"
description: "An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-20034
---

# CVE-2021-20034: Improper Access Control | CubePath

## Description

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.

Official description from the CVE record, published by sonicwall. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-20034)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.81831 (81.8% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-284](https://cwe.mitre.org/data/definitions/284.html) Improper Access Control

## Affected products

Products listed in the CVE record, as the CNA published them.

- SonicWall SMA100

  - affected: 9.0.0.10-28sv and earlier
  - affected: 10.2.0.7-34sv and earlier
  - affected: 10.2.1.0-17sv and earlier

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021)
- [packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0…](http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html)

## Timeline

1. ID reserved Dec 17, 2020
2. Record published Sep 27, 2021
3. Record last updated Aug 3, 2024

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)