CVE-2026-20099
Cisco UCS Manager and FXOS Software Command Injection Vulnerability
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.
Weakness: CWE-78
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Check your version | Firewall / NGFW | cna-assigner |
| Cisco | Cisco Firepower Extensible OS (FXOS) | Firewall / NGFW | cna-assigner |
| Cisco | Cisco Unified Computing System (UCS) | Other Products | cna-assigner |
Vendor-reported products (3)
- Cisco · Cisco Firepower Extensible Operating System (FXOS)
- Cisco · Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Cisco · Cisco Unified Computing System (Managed)
Vendor advisory
Cisco FXOS and UCS Manager Software Command Injection Vulnerability
Cisco’s rating: Medium (advisory CVSS 6.7) · Published Feb 25, 2026
Bug IDs: CSCwn02394 , CSCwo74009 , CSCwo74010
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from