CVE-2026-20016

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20016
A vulnerability in the Cisco FXOS Software CLI feature for Cisco Secure Firewall ASA Software and Secure FTD Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system with root-level privileges. 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 specific CLI commands. A successful exploit could allow the attacker to execute commands on the underlying operating system with root-level privileges.

6.0 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmd-inj-mTzGZexf Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
History

05 Jun 2026, 12:52

Type Values Removed Values Added
Summary
  • (es) Una vulnerabilidad en la característica CLI del software Cisco FXOS para el software Cisco Secure Firewall ASA y el software Secure FTD podría permitir a un atacante local autenticado ejecutar comandos arbitrarios en el sistema operativo subyacente con privilegios de nivel de root. Para explotar esta vulnerabilidad, el atacante debe tener credenciales administrativas válidas en un dispositivo afectado. Esta vulnerabilidad se debe a una validación de entrada insuficiente de los argumentos de comando proporcionados por el usuario. Un atacante podría explotar esta vulnerabilidad al enviar entrada manipulada para comandos CLI específicos. Un exploit exitoso podría permitir al atacante ejecutar comandos en el sistema operativo subyacente con privilegios de nivel de root.
References () https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmd-inj-mTzGZexf - () https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-cmd-inj-mTzGZexf - Vendor Advisory
CPE cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*
First Time Cisco
Cisco adaptive Security Appliance Software
Cisco firepower Threat Defense Software

04 Mar 2026, 19:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-04 19:16

Updated : 2026-06-17 10:16

NVD link : CVE-2026-20016

Mitre link : CVE-2026-20016

CVE.ORG link : CVE-2026-20016

JSON object : View

Products Affected

cisco

  • firepower_threat_defense_software
  • adaptive_security_appliance_software
CWE
CWE-88

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')