CVE-2021-20035 SonicWall SMA100 Appliances OS Command Injection
Remote authenticated attackers can inject arbitrary commands on SonicWall SMA100 devices, potentially causing denial of service.
- Exploited in the wild
- Since 16 Apr 2025
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20035?
CVE-2021-20035 is a medium-severity command injection vulnerability in SonicWall SMA100, published on 27 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
Weakness: CWE-78
Which versions are affected by CVE-2021-20035?
It affects 5 products.
Products include Sonicwall Sma 200 Firmware, Sonicwall Sma 210 Firmware, Sonicwall Sma 400 Firmware, Sonicwall Sma 410 Firmware, Sonicwall Sma 500v.
How do I fix CVE-2021-20035?
No fix has been published for CVE-2021-20035 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 7 May 2025.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-20035 being exploited?
Yes. Attackers have exploited CVE-2021-20035 in the wild since at least 16 Apr 2025.
Other vulnerabilities in SonicWall SMA100
- CVE-2021-20038 SonicWall SMA 100 Appliances Stack-Based Buffer Overflow
- CVE-2023-44221 SonicWall SMA100 Appliances OS Command Injection
- CVE-2022-22273 Command injection in SonicWall SRA/SMA100
- CVE-2021-20042 Server-side request forgery in SonicWall SMA100
- CVE-2021-20045 Memory corruption in SonicWall SMA100
Sources
Also known as GHSA-g24w-7v2m-52xh.