CVE-2020-3554

HIGH

Cisco ASA <9.12.4.3, >=9.13.0 <9.13.1.13 & FTD <6.2.2 - DoS via TCP Packet Processing

Title source: llm
STIX 2.1

Description

A vulnerability in the TCP packet processing of Cisco Adaptive Security Appliance (ASA) Software 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. The vulnerability is due to a memory exhaustion condition. An attacker could exploit this vulnerability by sending a high rate of crafted TCP traffic through an affected device. A successful exploit could allow the attacker to exhaust device resources, resulting in a DoS condition for traffic transiting the affected device.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0318
EPSS Percentile 87.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (4)
cisco/adaptive_security_appliance < 9.12.4.3
cisco/adaptive_security_appliance_software 9.13.0 - 9.13.1.13
cisco/firepower_threat_defense 6.6.0
cisco/firepower_threat_defense < 6.2.2
Published Oct 21, 2020
Tracked Since Feb 18, 2026