CVE & CISA-KEV Catalog

CVE-2026-20016

MEDIUM
6.0
CVSS v3
NVD

Description

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.

CWE-88

How to fix

Remediation Available
adaptive security appliance softwareNVD
Affected:>= 9.23.1, < 9.23.1.7Fixed in:9.23.1.7CVE-2026-20016derived from NVD
firepower threat defense softwareNVD
Affected:>= 7.7.0, < 7.7.11Fixed in:7.7.11CVE-2026-20016derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.33%probability of exploitation in 30 days
25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-88 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2016-10033Critical9.8100%KEVFix
CVE-2022-36804High8.899%KEVFix
CVE-2026-24061Critical9.899%KEVFix
CVE-2007-0882High10.098%--
CVE-2018-17456Critical9.897%-Fix
CVE-2018-19518High7.595%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-05.