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CVE PROGRAM SOURCE RECORD8.6 High

CVE-2026-20349

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

Description

A vulnerability in the Remote Access SSL VPN service for 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 insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Default version status: unknown

  • 9.16.1affected
  • 9.16.1.28affected
  • 9.16.2affected
  • 9.16.2.3affected
  • 9.16.2.7affected
  • 9.16.2.11affected
  • 9.16.2.13affected
  • 9.16.2.14affected
  • 9.16.3.3affected
  • 9.16.3affected
  • 9.16.3.14affected
  • 9.18.1affected
  • 9.16.3.15affected
  • 9.18.1.3affected
  • 9.18.2affected
  • 9.16.3.19affected
  • 9.16.3.23affected
  • 9.18.2.5affected
  • 9.16.4affected
  • 9.18.2.7affected
  • 9.19.1affected
  • 9.16.4.9affected
  • 9.18.2.8affected
  • 9.16.4.14affected
  • 9.18.3affected
  • 9.19.1.5affected
  • 9.16.4.18affected
  • 9.19.1.9affected
  • 9.18.3.39affected
  • 9.16.4.19affected
  • 9.19.1.12affected
  • 9.18.3.46affected
  • 9.16.4.27affected
  • 9.19.1.18affected
  • 9.18.3.53affected
  • 9.18.3.55affected
  • 9.16.4.38affected
  • 9.16.4.39affected
  • 9.18.3.56affected
  • 9.20.1affected
  • 9.16.4.42affected
  • 9.19.1.22affected
  • 9.18.4affected
  • 9.20.1.5affected
  • 9.18.4.5affected
  • 9.19.1.24affected
  • 9.16.4.48affected
  • 9.18.4.8affected
  • 9.20.2affected
  • 9.19.1.27affected
  • 9.16.4.55affected
  • 9.18.4.22affected
  • 9.20.2.10affected
  • 9.16.4.57affected
  • 9.19.1.28affected
  • 9.18.4.24affected
  • 9.20.2.21affected
  • 9.16.4.61affected
  • 9.19.1.31affected
  • 9.18.4.29affected
  • 9.20.2.22affected
  • 9.16.4.62affected
  • 9.18.4.34affected
  • 9.20.3affected
  • 9.16.4.67affected
  • 9.16.4.70affected
  • 9.18.4.40affected
  • 9.23.1affected
  • 9.22.1.1affected
  • 9.16.4.71affected
  • 9.20.3.4affected
  • 9.18.4.47affected
  • 9.20.3.7affected
  • 9.19.1.37affected
  • 9.16.4.76affected
  • 9.20.3.9affected
  • 9.19.1.38affected
  • 9.18.4.50affected
  • 9.22.1.3affected
  • 9.20.3.10affected
  • 9.22.1.2affected
  • 9.18.4.52affected
  • 9.20.3.13affected
  • 9.22.1.6affected
  • 9.18.4.53affected
  • 9.16.4.82affected
  • 9.22.2affected
  • 9.20.3.16affected
  • 9.19.1.42affected
  • 9.18.4.57affected
  • 9.16.4.84affected
  • 9.23.1.3affected
  • 9.20.3.20affected
  • 9.22.2.4affected
  • 9.23.1.7affected
  • 9.20.4affected
  • 9.22.2.9affected
  • 9.23.1.13affected
  • 9.20.4.7affected
  • 9.22.2.13affected
  • 9.18.4.66affected
  • 9.20.4.10affected
  • 9.23.1.19affected
  • 9.16.4.85affected
  • 9.22.2.14affected
  • 9.18.4.67affected
  • 9.24.1affected
  • 9.18.4.68affected
  • 9.23.1.22affected
  • 9.20.4.14affected
  • 9.22.2.20affected
  • 9.18.4.71affected
  • 9.20.4.19affected
  • 9.23.1.26affected
  • 9.16.4.89affected
  • 9.22.2.32affected
  • 9.18.4.76affected
  • 9.22.3affected
  • 9.24.1.5affected
  • 9.20.4.22affected
  • 9.24.1.9affected
  • 9.20.4.28affected
  • 9.22.3.5affected
  • 9.16.4.92affected
  • 9.18.4.135affected
  • 9.23.1.195affected
  • 9.20.4.30affected
  • 9.24.1.155affected
  • 9.23.1.32affected
  • 9.24.1.11affected
  • 9.20.4.34affected
  • 9.18.4.82affected

Cisco Cisco Secure Firewall Threat Defense (FTD) Software

Default version status: unknown

  • 7.0.0affected
  • 7.0.0.1affected
  • 7.0.1affected
  • 7.0.1.1affected
  • 7.0.2affected
  • 7.2.0affected
  • 7.0.2.1affected
  • 7.0.3affected
  • 7.2.0.1affected
  • 7.0.4affected
  • 7.2.1affected
  • 7.0.5affected
  • 7.3.0affected
  • 7.2.2affected
  • 7.2.3affected
  • 7.3.1affected
  • 7.2.4affected
  • 7.0.6affected
  • 7.2.5affected
  • 7.2.4.1affected
  • 7.3.1.1affected
  • 7.4.0affected
  • 7.0.6.1affected
  • 7.2.5.1affected
  • 7.4.1affected
  • 7.2.6affected
  • 7.0.6.2affected
  • 7.4.1.1affected
  • 7.2.7affected
  • 7.2.5.2affected
  • 7.3.1.2affected
  • 7.2.8affected
  • 7.6.0affected
  • 7.4.2affected
  • 7.2.8.1affected
  • 7.0.6.3affected
  • 7.4.2.1affected
  • 7.2.9affected
  • 7.0.7affected
  • 7.7.0affected
  • 7.4.2.2affected
  • 7.2.10affected
  • 7.6.1affected
  • 7.4.2.3affected
  • 7.0.8affected
  • 7.6.2affected
  • 7.7.10affected
  • 7.7.11affected
  • 7.0.8.1affected
  • 7.6.2.1affected
  • 7.7.10.1affected
  • 7.4.2.4affected
  • 7.2.10.2affected
  • 7.4.3affected
  • 7.6.4affected
  • 10.0.0affected
  • 7.4.4affected
  • 7.0.9affected
  • 7.2.11affected
  • 7.4.7affected
  • 10.0.2affected

References