CVE-2019-1895: Cisco Enterprise NFV Infrastructure Software VNC Authentication Bypass Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-08-07 · updated 2026-08-24
Weakness: CWE-306

Description

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 products

Cisco Enterprise NFV Infrastructure Software: before 3.12.1 — fixed in 3.12.1

How to fix

Upgrade to a fixed version: Cisco Enterprise NFV Infrastructure Software 3.12.1. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2019-1895 or the next vulnerability affects your stack