All vulnerabilities
CVE-2026-76418

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service Vulnerability

Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) SoftwareNetwork & edge
Open in ThreatlineRecord JSON
CVSS
8.6High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published28 Oct 2026Updated 28 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Vendor and government advisories 1

Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.

Reports 2

2 outlets mention it. Reports are not confirmation; each links to its source.

Description

A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Text from CVE List

Affected versions 60

  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.1CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.1.28CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2.3CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2.7CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2.11CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2.13CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.2.14CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3.3CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3.14CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.1CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3.15CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.1.3CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.2CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3.19CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.3.23CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.2.5CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.4CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.2.7CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.19.1CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.4.9CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.2.8CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.4.14CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.3CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.19.1.5CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.4.18CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.19.1.9CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.18.3.39CVE List
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected: 9.16.4.19CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.0CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.0.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.1.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.2CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.0CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.2.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.3CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.0.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.4CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.5CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.3.0CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.2CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.3CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.3.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.4CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.6CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.5CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.4.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.3.1.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.4.0CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.6.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.5.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.4.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.6CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.0.6.2CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.4.1.1CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.7CVE List
  • Cisco Secure Firewall Threat Defense (FTD) Softwareaffected: 7.2.5.2CVE List

References 1