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Fencer Intel
medium 4.2

CVE-2019-1609 json

Cisco NX-OS Software CLI Command Injection Vulnerability (CVE-2019-1609)

published 7y ago modified 4mo ago also EUVD-2019-10166

cvss
4.2
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system of an affected device. The vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with elevated privileges. An attacker would need valid administrator credentials to exploit this vulnerability. MDS 9000 Series Multilayer Switches are affected in versions prior to 6.2(27), 8.1(1b), and 8.3(2). Nexus 3500 Platform Switches are affected in versions prior to 7.0(3)I7(6). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I4(9) and 7.0(3)I7(6). Nexus 3600 Platform Switches are affected in versions prior to 7.0(3)F3(5). Nexus 7000 and 7700 Series Switches are affected in versions prior to 6.2(22), 7.3(3)D1(1), 8.2(3), and 8.3(2). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions prior to 7.0(3)I4(9) and7.0(3)I7(6). Nexus 9500 R-Series Line Cards and Fabric Modules are affected in versions prior to 7.0(3)F3(5).

Patch / fix

  • Cisco MDS 9000 Series Multilayer Switches 6.2(27), 8.1(1b), 8.3(2)
  • Cisco Nexus 3500 Platform Switches 7.0(3)I7(6)
  • Cisco Nexus 3000 Series Switches 7.0(3)I4(9), 7.0(3)I7(6)
  • Cisco Nexus 3600 Platform Switches 7.0(3)F3(5)
  • Cisco Nexus 7000 and 7700 Series Switches 6.2(22), 7.3(3)D1(1), 8.2(3), 8.3(2)
  • Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode 7.0(3)I4(9), 7.0(3)I7(6)
  • Cisco Nexus 9500 R-Series Line Cards and Fabric Modules 7.0(3)F3(5)

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 4.2 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • Cisco MDS 9000 Series Multilayer Switches
  • Cisco Nexus 3500 Platform Switches
  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3600 Platform Switches
  • Cisco Nexus 7000 and 7700 Series Switches
  • Cisco Nexus 9000 Series Switches in Standalone NX-OS Mode
  • Cisco Nexus 9500 R-Series Line Cards and Fabric Modules

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.