---
id: CVE-2020-3254
title: >-
  Multiple vulnerabilities in the Media Gateway Control Protocol (MGCP)
  inspection feature of Cisco Adaptive Security Appliance (ASA) Software and
  Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote
  attacker to c…
summary: >-
  Multiple vulnerabilities in the Media Gateway Control Protocol (MGCP)
  inspection feature of Cisco Adaptive Security Appliance (ASA) Software and
  Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote
  attacker to c…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-400
vendor: cisco
product: secure_firewall_threat_defense
affected:
  - 'secure_firewall_threat_defense >= 6.2.3, < 6.2.3.16'
  - 'secure_firewall_threat_defense >= 6.3.0, < 6.3.0.6'
  - 'secure_firewall_threat_defense >= 6.4.0, < 6.4.0.4'
  - asa_5505_firmware = 9.10(1.3)
  - asa_5510_firmware = 9.10(1.3)
  - asa_5512-x_firmware = 9.10(1.3)
  - asa_5515-x_firmware = 9.10(1.3)
  - asa_5520_firmware = 9.10(1.3)
  - asa_5525-x_firmware = 9.10(1.3)
  - asa_5540_firmware = 9.10(1.3)
  - asa_5545-x_firmware = 9.10(1.3)
  - asa_5550_firmware = 9.10(1.3)
  - asa_5555-x_firmware = 9.10(1.3)
  - asa_5580_firmware = 9.10(1.3)
  - asa_5585-x_firmware = 9.10(1.3)
  - 'adaptive_security_appliance_software >= 9.6, < 9.6.4.34'
  - 'adaptive_security_appliance_software >= 9.8, < 9.8.4.7'
  - 'adaptive_security_appliance_software >= 9.9, < 9.9.2.66'
  - 'adaptive_security_appliance_software >= 9.10, < 9.10.1.27'
  - 'adaptive_security_appliance_software >= 9.12, < 9.12.2.1'
patched:
  - secure_firewall_threat_defense 6.4.0.4
  - adaptive_security_appliance_software 9.12.2.1
published: '2020-05-06'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-3254'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-mgcp-SUqB8VKH
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-mgcp-SUqB8VKH
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01967
epssPercentile: 0.79521
ingestedAt: '2026-08-11T19:48:27.681Z'
---

## Overview

Multiple vulnerabilities in the Media Gateway Control Protocol (MGCP) inspection feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerabilities are due to inefficient memory management. An attacker could exploit these vulnerabilities by sending crafted MGCP packets through an affected device. An exploit could allow the attacker to cause memory exhaustion resulting in a restart of an affected device, causing a DoS condition for traffic traversing the device.

## Affected

- `secure_firewall_threat_defense >= 6.2.3, < 6.2.3.16`
- `secure_firewall_threat_defense >= 6.3.0, < 6.3.0.6`
- `secure_firewall_threat_defense >= 6.4.0, < 6.4.0.4`
- `asa_5505_firmware = 9.10(1.3)`
- `asa_5510_firmware = 9.10(1.3)`
- `asa_5512-x_firmware = 9.10(1.3)`
- `asa_5515-x_firmware = 9.10(1.3)`
- `asa_5520_firmware = 9.10(1.3)`
- `asa_5525-x_firmware = 9.10(1.3)`
- `asa_5540_firmware = 9.10(1.3)`
- `asa_5545-x_firmware = 9.10(1.3)`
- `asa_5550_firmware = 9.10(1.3)`
- `asa_5555-x_firmware = 9.10(1.3)`
- `asa_5580_firmware = 9.10(1.3)`
- `asa_5585-x_firmware = 9.10(1.3)`
- `adaptive_security_appliance_software >= 9.6, < 9.6.4.34`
- `adaptive_security_appliance_software >= 9.8, < 9.8.4.7`
- `adaptive_security_appliance_software >= 9.9, < 9.9.2.66`
- `adaptive_security_appliance_software >= 9.10, < 9.10.1.27`
- `adaptive_security_appliance_software >= 9.12, < 9.12.2.1`

## Remediation

Upgrade past the affected range:

- `secure_firewall_threat_defense 6.4.0.4`
- `adaptive_security_appliance_software 9.12.2.1`