---
id: CVE-2019-1895
title: >-
  A vulnerability in the Virtual Network Computing (VNC) console implementation
  of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an
  unauthenticated, remote attacker to access the VNC console session of an
  administrative …
summary: >-
  A vulnerability in the Virtual Network Computing (VNC) console implementation
  of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an
  unauthenticated, remote attacker to access the VNC console session of an
  administrative …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
  - CWE-306
vendor: cisco
product: enterprise_nfv_infrastructure_software
affected:
  - enterprise_nfv_infrastructure_software < 3.12.1
patched:
  - enterprise_nfv_infrastructure_software 3.12.1
published: '2019-08-07'
updated: '2026-08-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-1895'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-nfvis-vnc-authbypass
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190807-nfvis-vnc-authbypass
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02285
epssPercentile: 0.82412
ingestedAt: '2026-08-24T19:09:59.101Z'
---

## Overview

A vulnerability in the Virtual Network Computing (VNC) console implementation of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an unauthenticated, remote attacker to access the VNC console session of an administrative user on an affected device. The vulnerability is due to an insufficient authentication mechanism used to establish a VNC session. An attacker could exploit this vulnerability by intercepting an administrator VNC session request prior to login. A successful exploit could allow the attacker to watch the administrator console session or interact with it, allowing admin access to the affected device.

## Affected

- `enterprise_nfv_infrastructure_software < 3.12.1`

## Remediation

Upgrade past the affected range:

- `enterprise_nfv_infrastructure_software 3.12.1`