---
id: CVE-2026-20042
title: "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.\r\n\r\nThis vulnerability ex…"
summary: "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.\r\n\r\nThis vulnerability ex…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-295
vendor: cisco
product: nexus_dashboard
affected:
  - nexus_dashboard < 4.2.1
patched:
  - nexus_dashboard 4.2.1
published: '2026-04-01'
updated: '2026-07-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20042'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nd-cbid-5YqkOSHu
    label: psirt@cisco.com
tags:
  - nvd
epss: 0.00293
epssPercentile: 0.19523
ingestedAt: '2026-07-08T13:51:10.440Z'
---

## Overview

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.

## Affected

- `nexus_dashboard < 4.2.1`

## Remediation

Upgrade past the affected range:

- `nexus_dashboard 4.2.1`