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Cisco FXOS and UCS Manager Software Command Injection Vulnerability

cisco-sa-ucsciv-wGYtC78q · Medium · Published · Updated

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsciv-wGYtC78q This advisory is part of the February 2026 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: February 2026 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication.

Cisco advisory · CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2026-20099
Cisco Bug IDsCSCwn02394, CSCwo74009, CSCwo74010
CVSS ScoreBase 6.7
Base 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Unified Computing System (Managed), Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 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Related Products

Product CVE Evidence
Firepower Extensible Operating System CVE-2026-20099 Cisco OpenVuln
Cisco Unified Computing System (Managed) CVE-2026-20099 Cisco OpenVuln
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CVE-2026-20099 Cisco OpenVuln
Cisco Firepower Extensible Operating System (FXOS) CVE-2026-20099 Cisco OpenVuln
Cisco Firepower Extensible Operating System CVE-2026-20099 Cisco OpenVuln
Cisco Firepower 9000 Series CVE-2026-20099 Cisco OpenVuln
Cisco Firepower 4100 Series CVE-2026-20099 Cisco OpenVuln
Cisco Firepower 2100 Series CVE-2026-20099 Cisco OpenVuln