Cisco Secure Firewall Threat Defense Software up to 7.7.10.1 CLI argument injection

Summaryinfo

A vulnerability was found in Cisco Secure Firewall Threat Defense Software up to 7.7.10.1. It has been declared as critical. This impacts an unknown function of the component CLI. Such manipulation leads to argument injection. This vulnerability is referenced as CVE-2026-20063. The attack can only be performed from a local environment. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Secure Firewall Threat Defense Software up to 7.7.10.1. It has been rated as critical. Affected by this issue is some unknown processing of the component CLI. The manipulation with an unknown input leads to a argument injection vulnerability. Using CWE to declare the problem leads to CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the CLI of Cisco Secure FTD Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system as root. To exploit this vulnerability, the attacker must have valid administrative credentials on an affected device. This vulnerability is due to insufficient input validation of user-supplied command arguments. An attacker could exploit this vulnerability by submitting crafted input for a specific CLI command. A successful exploit could allow the attacker to execute commands on the underlying operating system as root.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2026-20063 since 10/08/2025. The exploitation is known to be easy. Local access is required to approach this attack. The exploitation requires an enhanced level of successful authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• Secure Firewall Threat Defense Software

Version

• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.2.1
• 7.7.0
• 7.7.10
• 7.7.10.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

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