CVE-2026-20099

Medium

Description

A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root.  This vulnerability is due to insufficient input validation of command arguments supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of the affected device with root-level privileges.

SeverityMedium
CVSS6.7
Exploit probability55. percentile0.7%
ProductCisco Firepower Extensible Operating System (FXOS)
PublishedFeb 25, 2026
First seenFeb 25, 2026

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
Cisco Cisco Firepower Extensible Operating System (FXOS)2.3.1.99, 2.3.1.56, 2.3.1.110, 2.3.1.58, 2.6.1.174, 2.6.1.157, 2.3.1.91, 2.3.1.73, 2.3.1.66, 2.6.1.166, 2.3.1.111, 2.3.1.166, 2.3.1.144, 2.6.1.131, 2.3.1.130, 2.3.1.88, 2.6.1.169, 2.3.1.75, 2.3.1.93, 2.3.1.145, 2.3.1.155, 2.6.1.187, 2.3.1.173, 2.3.1.179, 2.6.1.192, 2.3.1.180, 2.6.1.204, 2.6.1.214, 2.3.1.190, 2.6.1.224, 2.6.1.229, 2.3.1.215, 2.10.1.159, 2.3.1.216, 2.6.1.230, 2.10.1.166, 2.6.1.238, 2.6.1.239, 2.11.1.154, 2.10.1.179, 2.3.1.219, 2.6.1.254, 2.12.0.31, 2.12.0.432, 2.10.1.207, 2.3.1.230, 2.6.1.259, 2.11.1.182, 2.12.0.450, 2.10.1.234, 2.13.0.198, 2.12.0.467, 2.13.0.212, 2.6.1.264, 2.10.1.245, 2.11.1.200, 2.12.0.498, 2.10.1.271, 2.12.1.29, 2.13.0.243, 2.11.1.205, 2.6.1.265, 2.12.1.48, 2.14.1.131, 2.13.0.276, 2.11.1.228, 2.12.1.72, 2.10.1.312, 2.6.1.272, 2.14.1.143, 2.14.1.163, 2.14.1.167, 2.12.1.84, 2.16.0.128, 2.10.1.328, 2.10.1.341, 2.11.1.236, 2.12.1.95, 2.13.0.357, 2.16.0.136, 2.14.1.186, 2.17.0.518, 2.14.1.187—
Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software9.12.2, 9.12.1, 9.12.3, 9.12.4, 9.12.3.2, 9.12.3.12, 9.12.2.5, 9.12.1.2, 9.12.2.1, 9.12.3.7, 9.12.2.9, 9.12.3.9, 9.12.1.3, 9.12.4.2, 9.12.4.4, 9.12.4.7, 9.12.4.8, 9.12.4.10, 9.12.4.13, 9.12.4.18, 9.12.4.24, 9.16.1, 9.12.4.26, 9.16.1.28, 9.12.4.29, 9.16.2, 9.12.4.30, 9.16.2.3, 9.12.4.35, 9.16.2.7, 9.12.4.37, 9.17.1, 9.16.2.11, 9.16.2.13, 9.12.4.39, 9.12.4.38, 9.16.2.14, 9.17.1.7, 9.12.4.40, 9.16.3.3, 9.16.3, 9.17.1.9, 9.16.3.14, 9.12.4.41, 9.17.1.10, 9.18.1, 9.12.4.47, 9.16.3.15, 9.18.1.3, 9.17.1.11, 9.12.4.48, 9.18.2, 9.16.3.19, 9.17.1.13, 9.12.4.50, 9.17.1.15, 9.12.4.52, 9.16.3.23, 9.18.2.5, 9.16.4, 9.12.4.54, 9.17.1.20, 9.18.2.7, 9.19.1, 9.16.4.9, 9.12.4.55, 9.18.2.8, 9.16.4.14, 9.18.3, 9.19.1.5, 9.12.4.56, 9.17.1.30, 9.19.1.9, 9.18.3.39, 9.16.4.19, 9.12.4.58, 9.19.1.12, 9.18.3.46, 9.16.4.27, 9.19.1.18, 9.18.3.53, 9.18.3.55, 9.16.4.38, 9.17.1.33, 9.12.4.62, 9.16.4.39, 9.18.3.56, 9.16.4.42, 9.19.1.22, 9.18.4, 9.18.4.5, 9.19.1.24, 9.16.4.48, 9.18.4.8, 9.20.2, 9.19.1.27, 9.12.4.65, 9.16.4.55, 9.18.4.22, 9.20.2.10, 9.16.4.57, 9.19.1.28, 9.17.1.39, 9.12.4.67, 9.18.4.24, 9.20.2.21, 9.16.4.61, 9.19.1.31, 9.18.4.29, 9.20.2.22, 9.16.4.62, 9.18.4.34, 9.20.3, 9.16.4.67, 9.18.4.40, 9.16.4.71, 9.20.3.4—

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