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CVE-2019-1804

CRITICAL

A vulnerability in the SSH key management for the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to connect to the affected system with the privileges of the root user. The vulnerability is due to the presence of a default SSH key pair that is present in all devices. An attacker could exploit this vulnerability by opening an SSH connection via IPv6 to a targeted device using the extracted key materials. An exploit could allow the attacker to access the system with the privileges of the root user. This vulnerability is only exploitable over IPv6; IPv4 is not vulnerable.

Published: May 3, 2019 Modified: Jun 17, 2026
CWE-310 CWE-1188

CVSS Metrics

CVSSv3
Attack Vector: NETWORK Attack Complexity: LOW Privileges Required: NONE User Interaction: NONE Scope: UNCHANGED Confidentiality Impact: HIGH Integrity Impact: HIGH Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products (13)

Vendor Product Version
cisco nexus_9332pq_firmware 14.0\(3d\)
cisco nexus_93180yc-ex_firmware 14.0\(3d\)
cisco nexus_93128tx_firmware 14.0\(3d\)
cisco nexus_93120tx_firmware 14.0\(3d\)
cisco nexus_93108tc-ex_firmware 14.0\(3d\)
cisco nexus_9516_firmware 14.0\(3d\)
cisco nexus_9508_firmware 14.0\(3d\)
cisco nexus_9504_firmware 14.0\(3d\)
cisco nexus_9500_firmware 14.0\(3d\)
cisco nexus_9396tx_firmware 14.0\(3d\)
cisco nexus_9396px_firmware 14.0\(3d\)
cisco nexus_9372tx_firmware 14.0\(3d\)
cisco nexus_9372px_firmware 14.0\(3d\)

GitHub Security Advisory GHSA-9hxx-97w4-fh95

A vulnerability in the SSH key management for the Cisco Nexus 9000 Series Application Centric...

Risk Scores

CVSS Score 9.8 / 10
EPSS Score 3.48%

Top 12% most likely to be exploited

Threat Score 40.2 / 100

Data Sources

NVD EPSS GitHub