CVE-2026-20154

A vulnerability in the system rate-limiting process for syslog message 419002 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 high CPU utilization on an affected device...

CVE-2026-20121 CIsco FTD Bypass Access List

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

CVE-2026-20121

A logic error in the Object Group Search (OGS) implementation of Cisco Secure Firewall ASA and FTD Software allows an unauthenticated, remote attacker to bypass configured access controls by sending traffic that should be blocked through the device. A successful exploit could let the attacker rea...

CVE-2026-20121 CIsco FTD Bypass Access List

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

EUVD-2026-81017

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

CVE-2026-20120 Cisco FTD ACL bypass vulnerability

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

CVE-2026-20120 Cisco FTD ACL bypass vulnerability

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

EUVD-2026-81153

A vulnerability in the access control list ACL Object Group Search OGS implementation of Cisco Secure Firewall Adaptive Security Appliance ASA Software and Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass configured access controls. This...

EUVD-2026-81150

A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart. This vulnerability is due to incomplete validation of the SSL...

CVE-2026-20290

CVE-2026-20290 affects the Snort 2 Detection Engine within Cisco Secure Firewall Threat Defense (FTD) Software . The root cause is incomplete validation of SSL certificates during parsing. An unauthenticated, remote attacker can exploit this by sending a crafted SSL connection setup request, caus...

CVE-2026-20290 Cisco Secure Firewall Threat Defense Software Snort 2 SSL/TLS Denial of Service Vulnerability

A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart. This vulnerability is due to incomplete validation of the SSL...

CVE-2026-20290 Cisco Secure Firewall Threat Defense Software Snort 2 SSL/TLS Denial of Service Vulnerability

A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart. This vulnerability is due to incomplete validation of the SSL...

CVE-2026-20248

CVE-2026-20248 affects the DNS over TCP implementation in Cisco Secure Firewall Adaptive Security Appliance (ASA) and Cisco Secure Firewall Threat Defense (FTD) Software. The root cause is a logic error in parsing DNS queries and tracking the size of incoming buffers. An unauthenticated, remote a...

EUVD-2026-81143

A vulnerability in the DNS over TCP implementation 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 TCP DNS response handler to unexpectedly restart, causing the...

CVE-2026-20248 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software TCP DNS Denial of Service Vulnerability

A vulnerability in the DNS over TCP implementation 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 TCP DNS response handler to unexpectedly restart, causing the...

CVE-2026-20248 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software TCP DNS Denial of Service Vulnerability

A vulnerability in the DNS over TCP implementation 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 TCP DNS response handler to unexpectedly restart, causing the...

CVE-2026-20341

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software could allow an authenticated, remote attacker to obtain root privileges. This vulnerability is due to unsecured deserialization of untrusted data over the sftunnel management connection. An attacker...

CVE-2026-20329

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal securi...

CVE-2026-20324

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure Firewall Management Center FMC Software could allow an authenticated, remote attacker to execute arbitrary commands as root. This vulnerability exists because a registered sftunnel peer has incorrect permissions t...

CVE-2026-20330

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal securi...