CVE-2026-20042
Received Received - Intake
Encryption Key Exposure in Cisco Nexus Dashboard Backup Enables Root Access

Publication date: 2026-04-01

Last updated on: 2026-04-01

Assigner: Cisco Systems, Inc.

Description
A vulnerability in the configuration backup feature of Cisco Nexus Dashboard could allow an attacker who has the encryption password and access to Full or Config-only backup files to access sensitive information. This vulnerability exists because authentication details are included in the encrypted backup files. An attacker with a valid backup file and encryption password from an affected device could decrypt the backup file. The attacker could then use the authentication details in the backup file to access internal-only APIs on the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system as the root user.
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Meta Information
Published
2026-04-01
Last Modified
2026-04-01
Generated
2026-06-16
AI Q&A
2026-04-01
EPSS Evaluated
2026-06-15
NVD
EUVD
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
cisco nexus_dashboard *
cisco nexus_dashboard From 3.1(1k) (inc) to 4.2 (exc)
cisco nexus_dashboard to 3.2 (exc)
cisco nexus_dashboard to 4.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-295 The product does not validate, or incorrectly validates, a certificate.
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Executive Summary

This vulnerability affects the configuration backup feature of Cisco Nexus Dashboard. It occurs because authentication details are included within encrypted backup files.

An attacker who has both the encryption password and access to Full or Config-only backup files from an affected device can decrypt these backups. By extracting the authentication details, the attacker can access internal-only APIs on the device.

If successfully exploited, the attacker could execute arbitrary commands on the underlying operating system with root privileges.

Impact Analysis

The impact of this vulnerability includes unauthorized access to sensitive authentication details stored in backup files.

An attacker with these details can access internal-only APIs and potentially execute arbitrary commands on the device's operating system as the root user.

This could lead to full control over the affected device, compromising its security and potentially affecting the network infrastructure it manages.

Detection Guidance

There are no specific detection commands or methods provided to identify this vulnerability on your network or system.

Detection would generally involve verifying if your Cisco Nexus Dashboard is running a vulnerable software version (3.2 and earlier, or 4.1) and if configuration backup files with encryption passwords are accessible.

Mitigation Strategies

Cisco strongly recommends upgrading to fixed software releases to fully remediate this vulnerability.

  • Upgrade Cisco Nexus Dashboard to version 4.2 or later, which are not vulnerable.
  • Avoid using vulnerable releases such as versions 3.2 and earlier, and 4.1.
  • Obtain fixed software through authorized channels or Cisco Technical Assistance Center (TAC).

No workarounds are available for this vulnerability, so upgrading is the only effective mitigation.

Compliance Impact

The vulnerability in Cisco Nexus Dashboard's configuration backup feature could lead to unauthorized access to sensitive information by attackers who have both the encryption password and access to backup files. This exposure of authentication details and potential for executing arbitrary commands with root privileges could compromise the confidentiality and integrity of data.

Such a compromise may impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of sensitive data and strict access controls. Unauthorized access to sensitive information and system control could result in violations of these regulatory requirements.

However, the provided information does not explicitly mention compliance impacts or specific regulatory considerations.

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