---
id: CVE-2019-12676
title: >-
  A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco
  Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense
  (FTD) Software could allow an unauthenticated, adjacent attacker to cause a
  relo…
summary: >-
  A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco
  Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense
  (FTD) Software could allow an unauthenticated, adjacent attacker to cause a
  relo…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-20
vendor: cisco
product: adaptive_security_appliance
affected:
  - adaptive_security_appliance < 9.6.4.34
  - 'adaptive_security_appliance_software >= 9.7, < 9.8.4.8'
  - 'adaptive_security_appliance_software >= 9.9, < 9.9.2.59'
  - 'adaptive_security_appliance_software >= 9.10, < 9.10.1.27'
  - 'adaptive_security_appliance_software >= 9.12, < 9.12.2.1'
  - secure_firewall_threat_defense < 6.3.0.4
  - 'secure_firewall_threat_defense >= 6.4.0, < 6.4.0.4'
patched:
  - adaptive_security_appliance 9.6.4.34
  - adaptive_security_appliance_software 9.12.2.1
  - secure_firewall_threat_defense 6.4.0.4
published: '2019-10-02'
updated: '2026-08-11'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-12676'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ospf-lsa-dos
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-asa-ospf-lsa-dos
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00507
epssPercentile: 0.40722
ingestedAt: '2026-08-11T19:48:26.913Z'
---

## Overview

A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software improperly parses certain options in OSPF link-state advertisement (LSA) type 11 packets. An attacker could exploit this vulnerability by sending a crafted LSA type 11 OSPF packet to an affected device. A successful exploit could allow the attacker to cause a reload of the affected device, resulting in a DoS condition for client traffic that is traversing the device.

## Affected

- `adaptive_security_appliance < 9.6.4.34`
- `adaptive_security_appliance_software >= 9.7, < 9.8.4.8`
- `adaptive_security_appliance_software >= 9.9, < 9.9.2.59`
- `adaptive_security_appliance_software >= 9.10, < 9.10.1.27`
- `adaptive_security_appliance_software >= 9.12, < 9.12.2.1`
- `secure_firewall_threat_defense < 6.3.0.4`
- `secure_firewall_threat_defense >= 6.4.0, < 6.4.0.4`

## Remediation

Upgrade past the affected range:

- `adaptive_security_appliance 9.6.4.34`
- `adaptive_security_appliance_software 9.12.2.1`
- `secure_firewall_threat_defense 6.4.0.4`