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CVE-2024-20399

Cisco NX-OS Software CLI Command Injection Vulnerability

CVSS 3.1 Medium 6.0Known exploited (CISA KEV)

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Description

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated user in possession of Administrator credentials to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of arguments that are passed to specific configuration CLI commands. An attacker could exploit this vulnerability by including crafted input as the argument of an affected configuration CLI command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with the privileges of root. Note: To successfully exploit this vulnerability on a Cisco NX-OS device, an attacker must have Administrator credentials. The following Cisco devices already allow administrative users to access the underlying operating system through the bash-shell feature, so, for these devices, this vulnerability does not grant any additional privileges: Nexus 3000 Series Switches Nexus 7000 Series Switches that are running Cisco NX-OS Software releases 8.1(1) and later Nexus 9000 Series Switches in standalone NX-OS mode

Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 Medium 6.0

Score published by cisco in the CVE record.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: High

    An account with significant privileges, such as an administrator, is needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: None

    No effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.04306 (4.3% probability)
Percentile
91.2%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Cisco NX-OS Command Injection Vulnerability
Added to the catalog
Jul 2, 2024
Federal due date
Jul 23, 2024

CISA assessment as of Jul 2, 2024

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
no
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-78Improper Neutralization of Special Elements used in an OS Command

Affected products

Products listed in the CVE record, as the CNA published them.

  • Cisco NX-OS Software

    • affected: 8.2(5)
    • affected: 7.3(6)N1(1a)
    • affected: 7.3(5)D1(1)
    • affected: 8.4(2)
    • affected: 7.3(6)N1(1)
    • affected: 6.2(2)
    • affected: 8.4(3)
    • affected: 9.2(3)
    • affected: 7.0(3)I5(2)
    • affected: 8.2(1)
    • affected: 6.0(2)A8(7a)
    • affected: 7.0(3)I4(5)
    • affected: 6.0(2)A6(1)
    • affected: 7.3(1)D1(1)
    • affected: 6.2(14a)
    • affected: 7.0(3)I4(6)
    • affected: 7.3(4)N1(1)
    • affected: 7.0(3)I4(3)
    • affected: 9.2(2v)
    • affected: 6.0(2)A6(5b)
    • affected: 7.3(0)D1(1)
    • affected: 6.2(17a)
    • affected: 7.0(3)I4(7)
    • affected: 6.0(2)U6(1a)
    • affected: 7.1(5)N1(1b)
    • and 293 more

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:51 UTC. Sources and licenses