Medium 6.7Published Feb 25, 2026

CVE-2026-20099Cisco UCS Manager and FXOS Software Command Injection Vulnerability

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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It affects Cisco Firepower Extensible Operating System (FXOS) and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Cisco Firepower Extensible Operating System (FXOS)

Exploited in the last 30 days

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.

CVSS: 6.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: cisco
NVD analysis: Deferred
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Cisco Cisco Firepower Extensible Operating System (FXOS) cisco:firepower_extensible_operating_system_fxos (from the name)	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; and 75 more ranges	CNA record
Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software cisco:secure_firewall_adaptive_security_appliance_asa_software (from the name)	9.12.2; 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; and 127 more ranges	CNA record
Cisco Cisco Unified Computing System (Managed) cisco:unified_computing_system_managed (from the name)	4.0(4h); 4.1(1a); 4.0(1c); 4.0(4a); 4.0(1a); 4.0(1d); 4.1(1c); 4.0(2a); and 79 more ranges	CNA record

References

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsciv-wGYtC78q

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.