SB2026031053 - Multiple privilege escalation vulnerabilities in Cisco Secure Firewall Threat Defense
Published: March 10, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Improper Neutralization of Argument Delimiters in a Command (CVE-ID: CVE-2026-20017)
CWE-ID: CWE-88 - Argument Injection or Modification
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper input validation in certain CLI commands. A local privileged user can supply specially crafted arguments for specific CLI commands and execute arbitrary code as root.
2) Improper Neutralization of Argument Delimiters in a Command (CVE-ID: CVE-2026-20063)
CWE-ID: CWE-88 - Argument Injection or Modification
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper input validation in certain CLI commands. A local privileged user can supply specially crafted arguments for specific CLI commands and execute arbitrary code as root.
3) Improper Neutralization of Argument Delimiters in a Command (CVE-ID: CVE-2026-20064)
CWE-ID: CWE-88 - Argument Injection or Modification
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to improper validation of the user-supplied input for a specific CLI command. A local user can pass specially crafted arguments to a CLI command and perform a denial of service attack.
Remediation
Install update from vendor's website.