CVE-2020-3308: Cisco Secure Firewall Management Center

Medium severity, CVSS 4.9. EPSS: 0.6% chance of exploitation in the next 30 days.

A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.

Affected products

• Cisco Secure Firewall Management Center: version 6.2.2 only; version 6.2.3 only
• Cisco Secure Firewall Threat Defense: before 6.2.2.1 (fixed in 6.2.2.1)

Published 2020-05-06. Last modified 2026-08-11.