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CVE-2026-20099: Cisco UCS Manager and FXOS Software Command Injection Vulnerability
- Severity: medium (CVSS 6.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-25 · updated 2026-06-17
- Weakness: CWE-78
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
- Cisco ASA Software: 9.12.2, 9.12.1, 9.12.3, 9.12.4, 9.12.3.2, 9.12.3.12 (+129)
- 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 (+77)
- Cisco Unified Computing System (Managed): 4.0(4h), 4.1(1a), 4.0(1c), 4.0(4a), 4.0(1a), 4.0(1d) (+81)
References
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