CVE-2021-34756: Cisco Firepower Management Center Virtual Appliance

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.

Affected products

• Cisco Firepower Management Center Virtual Appliance: version 6.1.0 only; version 6.2.0 only; version 6.2.3 only; version 6.3.0 only; version 6.4.0 only; version 6.4.0.11 only; …
• Cisco Secure Firewall Threat Defense: from 6.4.0, before 6.4.0.13 (fixed in 6.4.0.13); from 6.6.0, before 6.6.5 (fixed in 6.6.5); from 6.7.0, before 6.7.0.3 (fixed in 6.7.0.3); from 7.0.0, before 7.0.1 (fixed in 7.0.1)
• Cisco Sourcefire Defense Center: version 6.1.0 only; version 6.2.0 only; version 6.2.3 only; version 6.3.0 only; version 6.4.0 only; version 6.4.0.11 only; …

Published 2021-10-27. Last modified 2026-08-11.