Improper input validation in Cisco Nexus Series Switches
Priority LOW 36CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-77.
Summary
A vulnerability in the CLI of Cisco NX-OS System Software 7.1 through 7.3 running on Cisco Nexus Series Switches could allow an authenticated, local attacker to perform a command injection attack. The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting crafted command arguments into a vulnerable CLI command. An exploit could allow the attacker to read or write arbitrary files at the user's privilege level outside of the user's path. Cisco Bug IDs: CSCvb86787, CSCve60516, CSCve60555.
Why it matters now
EPSS 0.00927 60th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Cisco Nexus Series Switches | Cisco Nexus Series Switches | — | No fix listed | CNA |
- Cisco Nexus Series Switches Vendor— Affected Cisco Nexus Series Switches Fixed in — No fix listed CNA
CPE configurations NVD · 21
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:nx-os:7.1\(1\)n1\(1\):*:*:*:*:*:*:* | 7.1(1)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(2\)n1\(1\):*:*:*:*:*:*:* | 7.1(2)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(1\):*:*:*:*:*:*:* | 7.1(3)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(2\):*:*:*:*:*:*:* | 7.1(3)n1(2) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(2.1\):*:*:*:*:*:*:* | 7.1(3)n1(2.1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(3.12\):*:*:*:*:*:*:* | 7.1(3)n1(3.12) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.1\(4\)n1\(1\):*:*:*:*:*:*:* | 7.1(4)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.2\(0\)d1\(0.437\):*:*:*:*:*:*:* | 7.2(0)d1(0.437) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.2\(0\)n1\(1\):*:*:*:*:*:*:* | 7.2(0)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.2\(0\)zz\(99.1\):*:*:*:*:*:*:* | 7.2(0)zz(99.1) | Vulnerable | Cisco |
- cpe:2.3:o:cisco:nx-os:7.1\(1\)n1\(1\):*:*:*:*:*:*:* Versions 7.1(1)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(2\)n1\(1\):*:*:*:*:*:*:* Versions 7.1(2)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(1\):*:*:*:*:*:*:* Versions 7.1(3)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(2\):*:*:*:*:*:*:* Versions 7.1(3)n1(2) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(2.1\):*:*:*:*:*:*:* Versions 7.1(3)n1(2.1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(3\)n1\(3.12\):*:*:*:*:*:*:* Versions 7.1(3)n1(3.12) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.1\(4\)n1\(1\):*:*:*:*:*:*:* Versions 7.1(4)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.2\(0\)d1\(0.437\):*:*:*:*:*:*:* Versions 7.2(0)d1(0.437) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.2\(0\)n1\(1\):*:*:*:*:*:*:* Versions 7.2(0)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.2\(0\)zz\(99.1\):*:*:*:*:*:*:* Versions 7.2(0)zz(99.1) Vulnerable ·Cisco
Show 11 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:nx-os:7.2\(1\)n1\(1\):*:*:*:*:*:*:* | 7.2(1)n1(1) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:7.3\(0\)n1\(1\):*:*:*:*:*:*:* | 7.3(0)n1(1) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:nexus_5548up:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5596t:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5596up:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_56128p:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5624q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5648q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5672up:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5672up-16g:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:h:cisco:nexus_5696q:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:nx-os:7.2\(1\)n1\(1\):*:*:*:*:*:*:* Versions 7.2(1)n1(1) Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:7.3\(0\)n1\(1\):*:*:*:*:*:*:* Versions 7.3(0)n1(1) Vulnerable ·Cisco
- cpe:2.3:h:cisco:nexus_5548up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5596t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5596up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_56128p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5624q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5648q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5672up:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5672up-16g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:h:cisco:nexus_5696q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-6649
- 2026-10-03 Alias added: GHSA-3rhr-63q6-v875
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-2017-6649 · CVE Program
- CVE-2017-6649 · NVD
- FIRST EPSS
- GHSA-3rhr-63q6-v875 · 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