CVE-2019-1812: Cisco NX-OS CLI Command Software Image Signature Verification Vulnerabilities

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-15 · updated 2026-06-17
Weakness: CWE-347

Description

A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software image on an affected device. The vulnerability exists because software digital signatures are not properly verified during CLI command execution. An attacker could exploit this vulnerability to install an unsigned software image on an affected device.

Affected products

Cisco NX-OS: from 6.0\(2\) before 7.0\(3\)i7\(5\); from 9.2 before 9.2\(2\); from 7.0\(3\) before 7.0\(3\)f3\(5\); before 7.0\(3\)i7\(5\) — fixed in 7.0\(3\)f3\(5\), 7.0\(3\)i7\(5\), 9.2\(2\)

How to fix

Upgrade to a fixed version: Cisco NX-OS 7.0\(3\)f3\(5\), 7.0\(3\)i7\(5\), 9.2\(2\). Check the vendor advisory for mitigations.

References

Get alerted when CVE-2019-1812 or the next vulnerability affects your stack