CVE-2021-20040

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A relative path traversal vulnerability in the SMA100 upload funtion allows a remote unauthenticated attacker to upload crafted web pages or files as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-23 CWE-22

Affected software

Vendor	Product	Versions
SonicWall	SonicWall SMA100	10.2.0.8-37sv and earlier; 10.2.1.1-19sv and earlier; 10.2.1.2-24sv and earlier

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026Vendor Advisory

Timeline

Published: Dec 8, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-200417.5An unauthenticated and remote adversary can consume all of the device's CPU due to crafted HTTP requests sent to SMA100 /fileshare/sonicfile CVE-2021-200429.8An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This CVE-2021-200438.8A Heap-based buffer overflow vulnerability in SonicWall SMA100 getBookmarks method allows a remote authenticated attacker to potentially exe CVE-2021-200448.8A post-authentication remote command injection vulnerability in SonicWall SMA100 allows a remote authenticated attacker to execute OS system CVE-2021-200459.8A buffer overflow vulnerability in SMA100 sonicfiles RAC_COPY_TO (RacNumber 36) method allows a remote unauthenticated attacker to potential CVE-2021-200468.8A Stack-based buffer overflow in the SonicOS HTTP Content-Length response header allows a remote authenticated attacker to cause Denial of S CVE-2021-200477.8SonicWall Global VPN client version 4.10.6 (32-bit and 64-bit) and earlier have a DLL Search Order Hijacking vulnerability. Successful explo CVE-2021-200488.8A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Servic CVE-2021-200497.5A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration base CVE-2021-20054.7Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Fusion Middleware (component: BI Platform Security). CVE-2021-200507.5An Improper Access Control Vulnerability in the SMA100 series leads to multiple restricted management APIs being accessible without a user l CVE-2021-200517.8SonicWall Global VPN Client 4.10.7.1117 installer (32-bit and 64-bit) and earlier versions have a DLL Search Order Hijacking vulnerability i