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 Telnet CLI command 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 the Telnet 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: CSCvb86771.
Why it matters now
EPSS 0.00909 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-2017-6650
- 2026-10-03 Alias added: GHSA-qmjg-x3m2-w2rj
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-2017-6650 · CVE Program
- CVE-2017-6650 · NVD
- FIRST EPSS
- GHSA-qmjg-x3m2-w2rj · 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