Cisco Unified Computing System Fabric Interconnect root Privilege Escalation Vulnerability
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
A vulnerability in a specific CLI command within the local management (local-mgmt) context for Cisco UCS Fabric Interconnect Software could allow an authenticated, local attacker to gain elevated privileges as the root user on an affected device. The vulnerability is due to extraneous subcommand options present for a specific CLI command within the local-mgmt context. An attacker could exploit this vulnerability by authenticating to an affected device, entering the local-mgmt context, and issuing a specific CLI command and submitting user input. A successful exploit could allow the attacker to execute arbitrary operating system commands as root on an affected device. The attacker would need to have valid user credentials for the device.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Unified Computing System (Managed) | before 4.0(2a) | 4.0(2a) | Patch available | CNA |
- Cisco Unified Computing System (Managed) VendorCisco Affected before 4.0(2a) Fixed in 4.0(2a) Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* | up to 3.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ucs_6248_up_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_6296_up_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_6324_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_6332-16up_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_6332_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:ucs_6454_fabric_interconnect:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:a:cisco:unified_computing_system:3.2\(3b\)a:*:*:*:*:*:*:* | 3.2(3b)a | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_computing_system:4.0\(1a\)a:*:*:*:*:*:*:* | 4.0(1a)a | Vulnerable | Cisco |
- cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* Versions up to 3.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ucs_6248_up_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_6296_up_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_6324_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_6332-16up_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_6332_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:ucs_6454_fabric_interconnect:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:a:cisco:unified_computing_system:3.2\(3b\)a:*:*:*:*:*:*:* Versions 3.2(3b)a Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_computing_system:4.0\(1a\)a:*:*:*:*:*:*:* Versions 4.0(1a)a Vulnerable ·Cisco
Remediation
- Fix · CNA Cisco Unified Computing System (Managed) (Cisco) Fixed in 4.0(2a)
Timeline
- 2026-10-02 Threatist record created from CVE-2019-1966
- 2026-10-03 Alias added: GHSA-wjmx-f4ff-3r2q
References
More Cisco Nx-os vulnerabilities
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-13332 Cisco NX-OS Software CLI Command Injection Vulnerability KEVCVSS 3.1MEDIUM 6.7
- TI-2018-00260 Improper input validation in Cisco NX-OS unknown CVSS 3.0CRITICAL 9.8
- TI-2019-01226 Cisco NX-OS Software Netstack Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2022-05183 Cisco NX-OS Software Cisco Fabric Services Over IP Denial of Service Vulnerability CVSS 3.1HIGH 8.6
- TI-2022-05182 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability CVSS 3.1HIGH 8.6
Sources
- CVE-2019-1966 · CVE Program
- CVE-2019-1966 · NVD
- FIRST EPSS
- GHSA-wjmx-f4ff-3r2q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences