CVE-2022-20854

HIGH

Cisco Secure Firewall Management Center - Improper Exception Handling

Title source: rule
STIX 2.1

Description

A vulnerability in the processing of SSH connections of Cisco Firepower Management Center (FMC) and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, resulting in a reboot on the affected device.

Scores

CVSS v3 7.5
EPSS 0.0079
EPSS Percentile 74.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-755 CWE-400
Status published
Products (36)
cisco/firepower_threat_defense 6.2.1
cisco/firepower_threat_defense 6.6.0
cisco/firepower_threat_defense 6.6.0.1
cisco/firepower_threat_defense 6.6.1
cisco/firepower_threat_defense 6.6.3
cisco/firepower_threat_defense 6.6.4
cisco/firepower_threat_defense 6.6.5
cisco/firepower_threat_defense 6.6.5.1
cisco/firepower_threat_defense 6.6.5.2
cisco/firepower_threat_defense 7.0.0
... and 26 more
Published Nov 15, 2022
Tracked Since Feb 18, 2026