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As of 09/15/2026, within CyStack's analyzed data, Cisco Firepower Extensible Operating System (FXOS) has 0 security vulnerabilities published in the last 90 days. Of these, 0 are rated High or Critical. None of these vulnerabilities is listed in the CISA KEV catalog. CyStack recommends that organizations and individual users remediate applicable vulnerabilities as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of Cisco Firepower Extensible Operating System (FXOS) and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
Explore CyStack VulnScan| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2026-20099Cisco UCS Manager and FXOS Software Command Injection Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published02/25/2026 | SeverityMedium |
CVE-2026-20091Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published02/25/2026 | SeverityMedium |
CVE-2024-20294 | Exploitation statusNot known exploited | FixNot confirmed | Published02/28/2024 | SeverityMedium |
CVE-2023-20234 | Exploitation statusNot confirmed | FixNot confirmed | Published08/23/2023 | SeverityMedium |
CVE-2023-20200 | Exploitation statusNot known exploited | FixNot confirmed | Published08/23/2023 | SeverityHigh |
CVE-2022-20934 | Exploitation statusNot known exploited | FixNot confirmed | Published11/10/2022 | SeverityMedium |
CVE-2022-20865Cisco FXOS Software Command Injection Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published08/25/2022 | SeverityMedium |
CVE-2020-3455Cisco FXOS Software for Firepower 4100/9300 Series Appliances Secure Boot Bypass Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published10/21/2020 | SeverityMedium |
CVE-2020-3459Cisco FXOS Software for Firepower 4100/9300 Series Command Injection Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published10/21/2020 | SeverityMedium |
CVE-2020-3545Cisco FXOS Software Buffer Overflow Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published09/04/2020 | SeverityMedium |
CVE-2020-3166Cisco FXOS Software CLI Arbitrary File Read and Write Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published02/26/2020 | SeverityMedium |
CVE-2020-3169Cisco FXOS Software CLI Command Injection Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published02/26/2020 | SeverityMedium |
CVE-2019-12699Cisco FXOS Software and Firepower Threat Defense Software Command Injection Vulnerabilities | Exploitation statusNot known exploited | FixNot confirmed | Published10/02/2019 | SeverityHigh |
CVE-2019-1858Cisco FXOS and NX-OS Software Simple Network Management Protocol Denial of Service Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published05/16/2019 | SeverityHigh |
CVE-2019-1700Cisco Firepower 9000 Series Firepower 2-Port 100G Double-Width Network Module Queue Wedge Denial of Service Vulnerability | Exploitation statusNot known exploited | FixNot confirmed | Published02/21/2019 | SeverityMedium |
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