CVE-2020-3457 Cisco FXOS Software Command Injection Vulnerability
Authenticated local attackers can inject commands into Cisco FXOS CLI to execute arbitrary code with root privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3457?
CVE-2020-3457 is a medium-severity command injection vulnerability in Cisco Adaptive Security Appliance Software, published on 21 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the CLI of Cisco FXOS Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges. The vulnerability is due to insufficient input validation of commands supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute commands on the underlying operating system with root privileges.
Weakness: CWE-78
Which versions are affected by CVE-2020-3457?
It affects 3 products.
Products include Cisco Adaptive Security Appliance Software, Cisco Firepower Extensible Operating System, Cisco Firepower Threat Defense.
How do I fix CVE-2020-3457?
No fix has been published for CVE-2020-3457 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2020-3457 being exploited?
There is no known exploitation of CVE-2020-3457 in the wild and no public exploit code.
Other vulnerabilities in Cisco Adaptive Security Appliance Software
- CVE-2025-20333 Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow
- CVE-2016-6366 Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow
- CVE-2026-20349 Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection
- CVE-2024-20353 Cisco ASA and FTD Denial of Service
- CVE-2016-6367 Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution
All Cisco Adaptive Security Appliance Software vulnerabilities
Sources
Also known as GHSA-84qj-wpjh-wvj6.