Firepower Threat Defense
CVE-2026-20017
MEDIUM
Severity by source
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Primary rating from Vendor (cisco) · only source for this CVE.
CVSS VectorVendor: cisco
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Insufficient input validation in Cisco Secure FTD Software's CLI allows authenticated local administrators to execute arbitrary commands with root privileges by submitting specially crafted arguments to specific commands. An attacker with valid administrative credentials can exploit this to gain complete control over the underlying operating system. No patch is currently available.
Technical ContextAI
Classified as CWE-250 (Execution with Unnecessary Privileges). Affects CLI of Cisco Secure FTD Software. 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 exp
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-250 – Execution with Unnecessary Privileges
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today