CVE-2019-1809

CVE-2019-1809 describes a vulnerability in the Image Signature Verification feature of Cisco NX-OS Software, allowing an authenticated, local attacker with administrator credentials to install malicious software patches. This flaw stems from improper digital signature verification for patch images, enabling an attacker to bypass checks with an unsigned patch. The vulnerability has a CVSS score of 6.7 (Medium), indicating a local attack vector with low complexity, high privileges required, and high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.