CVE-2026-20016
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with an admin-level account. High risk of data exposure, data tampering.
- Exploit odds
- 0.4% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.4% in the next 30 days (EPSS).
- Severity: 6.0 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.4% · EPSS, next 30 days
- Weakness
- CWE-88
- Record status
- Analyzed
Affected
- Cisco Adaptive Security Appliance Software < 9.16.4.85
- Cisco Adaptive Security Appliance Software < 9.18.4.66
- Cisco Adaptive Security Appliance Software < 9.20.4
- Cisco Adaptive Security Appliance Software < 9.22.2.4
- Cisco Adaptive Security Appliance Software < 9.23.1.7
- Cisco Secure Firewall Threat Defense < 7.0.9
- Cisco Secure Firewall Threat Defense < 7.2.11
- Cisco Secure Firewall Threat Defense < 7.4.3
Attack profile CVSS 3.1 · 6.0
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-20016.md and follow it. Check whether this project is affected by CVE-2026-20016. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
