Vulnerability · Published Feb 25, 2026 · Assigned by cisco
CVE-2026-20099Cisco UCS Manager and FXOS Software Command Injection Vulnerability
Medium 6.7
In plain English
A medium-severity OS command injection in Cisco Firepower Extensible Operating System (FXOS) from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Firepower Extensible Operating System (FXOS) | 2.3.1.992.3.1.562.3.1.1102.3.1.582.6.1.1742.6.1.1572.3.1.912.3.1.73 |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.12.29.12.19.12.39.12.49.12.3.29.12.3.129.12.2.59.12.1.2 |
| Cisco | Cisco Unified Computing System (Managed) | 4.0(4h)4.1(1a)4.0(1c)4.0(4a)4.0(1a)4.0(1d)4.1(1c)4.0(2a) |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H