Cisco Secure Firewall Threat Defense Software vulnerabilities

CVE-2026-20026 [MEDIUM] CWE-415 CVE-2026-20026: Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests t Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in buffer handling logic when p

CVE-2026-20057 [MEDIUM] CWE-369 CVE-2026-20057: Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability

CVE-2026-20006 [MEDIUM] CWE-388 CVE-2026-20006: A vulnerability in the TLS cryptography functionality of the Snort 3 Detection Engine of Cisco Secur A vulnerability in the TLS cryptography functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to unexpectedly restart, resulting in a denial of service (DoS) condition. This vulnerability is due to improper implementa

CVE-2026-20290 [MEDIUM] CWE-805 CVE-2026-20290: A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firew 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 certificate. An attacker could exploit this vulnerabilit

CVE-2026-20070 [MEDIUM] CWE-80 CVE-2026-20070: A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Applian A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a browser that is accessing an affected device. This vulnerability is due

CVE-2026-20052 [MEDIUM] CWE-788 CVE-2026-20052: A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure F A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet ins

CVE-2025-20360 [MEDIUM] CWE-805 CVE-2025-20360: Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of complete error checking when the MIME fields of the HTTP header are parsed. An attacker could exploit this vulnerability by

CVE-2026-76445 [MEDIUM] CWE-835 CVE-2026-76445: Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could a Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the detection engine to unexpectedly restart, resulting in a denial of service (DoS) condition. The vulnerability is due to a flaw in logic handling when General Packet Radio Service (GPRS) Tunneling

CVE-2026-20022 [MEDIUM] CWE-823 CVE-2026-20022: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the command debug ip ospf canon. This vulnerability is due to

CVE-2026-20102 [MEDIUM] CWE-79 CVE-2026-20102: A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software a A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against the SAML feature and access sensitive, browser-based information. This vulnerability is due t

CVE-2026-20027 [MEDIUM] CWE-200 CVE-2026-20027: Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests that c Multiple Cisco products are affected by a vulnerability in the processing of DCE/RPC requests that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to leak sensitive information or to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in buffer handling logic when p

CVE-2026-20106 [MEDIUM] CWE-401 CVE-2026-20106: A vulnerability in the Remote Access SSL VPN, HTTP management and MUS functionality, of Cisco Secure A vulnerability in the Remote Access SSL VPN, HTTP management and MUS functionality, of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust device memory resulting in a denial of service (DoS) condition requiring a manual reboot.

CVE-2026-20025 [MEDIUM] CWE-190 CVE-2026-20025: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to insufficient

CVE-2026-20023 [MEDIUM] CWE-787 CVE-2026-20023: A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to memory corruption wh

CVE-2026-20020 [MEDIUM] CWE-20 CVE-2026-20020: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. If OSPF authentication is enabled, the attacker must know the secret key to exploit this vulnerability. This vulner

CVE-2026-20064 [MEDIUM] CWE-476 CVE-2026-20064: A vulnerability in of Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticat A vulnerability in of Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, local attacker to cause the device to unexpectedly reload, causing a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input. An attacker with a low-privileged account could exploit this vulnerabi

CVE-2026-20024 [MEDIUM] CWE-119 CVE-2026-20024: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to heap corrupt

CVE-2026-20069 [MEDIUM] CWE-444 CVE-2026-20069: A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Applian A vulnerability in the VPN web services component of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of HTTP r

CVE-2026-20021 [MEDIUM] CWE-401 CVE-2026-20021: A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to improperly validating