---
id: CVE-2020-3478
title: >-
  A vulnerability in the REST API of Cisco Enterprise NFV Infrastructure
  Software (NFVIS) could allow an authenticated, remote attacker to overwrite
  certain files that should be restricted on an affected device
summary: >-
  A vulnerability in the REST API of Cisco Enterprise NFV Infrastructure
  Software (NFVIS) could allow an authenticated, remote attacker to overwrite
  certain files that should be restricted on an affected device. The
  vulnerability is due to…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-20
  - CWE-20
vendor: cisco
product: enterprise_nfv_infrastructure_software
affected:
  - 'enterprise_nfv_infrastructure_software >= 3.5.1, <= 4.1.2'
published: '2020-09-04'
updated: '2026-08-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-3478'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-file-overwrite-UONzPMkr
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-file-overwrite-UONzPMkr
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01213
epssPercentile: 0.66707
ingestedAt: '2026-08-24T19:09:59.664Z'
---

## Overview

A vulnerability in the REST API of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, remote attacker to overwrite certain files that should be restricted on an affected device. The vulnerability is due to insufficient authorization enforcement on an affected system. An attacker could exploit this vulnerability by uploading a file using the REST API. A successful exploit could allow an attacker to overwrite and upload files, which could degrade the functionality of the affected system.

## Affected

- `enterprise_nfv_infrastructure_software >= 3.5.1, <= 4.1.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.