Cisco ASA Out-of-bounds Write (CVE-2026-20023)

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...

Cisco ASA Improper Input Validation (CVE-2022-20745)

A vulnerability in the web services interface for remote access VPN features of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. This vulnerability is due to...

Cisco ASA Improper Input Validation (CVE-2026-20020)

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 th...

Cisco ASA Uncontrolled Resource Consumption (CVE-2020-3196)

A vulnerability in the Secure Sockets Layer SSL/Transport Layer Security TLS handler of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to exhaust memory resources on the affected device, leading to a...

Rockwell Automation Allen-Bradley Stratix 5950 Improper Input Validation (CVE-2018-0228)

A vulnerability in the ingress flow creation functionality of Cisco Adaptive Security Appliance ASA could allow an unauthenticated, remote attacker to cause the CPU to increase upwards of 100% utilization, causing a denial of service DoS condition on an affected system. The vulnerability is due t...

Cisco ASA Permissive List of Allowed Inputs (CVE-2021-34787)

A vulnerability in the identity-based firewall IDFW rule processing feature of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass security protections. This vulnerability is due to improper...

Cisco ASA Improper Enforcement of Message Integrity During Transmission in a Communication Channel (CVE-2021-34793)

A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance ASA Software and Firepower Threat Defense FTD Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service DoS vulnerability. This...

Rockwell Automation Allen-Bradley Stratix 5950 Improper Input Validation (CVE-2018-0296)

A vulnerability in the web interface of the Cisco Adaptive Security Appliance ASA could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service DoS condition. It is also possible on certain software releases that the ASA will...

Cisco ASA Improper Input Validation (CVE-2019-12676)

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...

Cisco ASA Integer Underflow (CVE-2019-12678)

A vulnerability in the Session Initiation Protocol SIP inspection module of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. The...

Cisco ASA Uncontrolled Resource Consumption (CVE-2020-3572)

A vulnerability in the SSL/TLS session handler of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. The vulnerability is due to a memory...

Cisco ASA Heap-based Buffer Overflow (CVE-2023-20081)

A vulnerability in the IPv6 DHCP DHCPv6 client module of Cisco Adaptive Security Appliance ASA Software, Cisco Firepower Threat Defense FTD Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an...

Cisco ASA Uncontrolled Resource Consumption (CVE-2020-3195)

A vulnerability in the Open Shortest Path First OSPF implementation in Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. The vulnerability is due to incorrect...

Cisco ASA Use of Out-of-range Pointer Offset (CVE-2026-20022)

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...

Cisco ASA Improper Input Validation (CVE-2022-20924)

A vulnerability in the Simple Network Management Protocol SNMP feature of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an authenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerabili...

Cisco ASA Improper Input Validation (CVE-2022-20715)

A vulnerability in the remote access SSL VPN features of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to...

Cisco ASA Uncontrolled Resource Consumption (CVE-2021-40125)

A vulnerability in the Internet Key Exchange Version 2 IKEv2 implementation of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an authenticated, remote attacker to trigger a denial of service DoS condition on an affected device. This...

Cisco ASA Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2026-20024)

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...

Cisco ASA Stack-based Buffer Overflow (CVE-2021-40118)

A vulnerability in the web services interface of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to trigger a denial of service DoS condition. This vulnerability is due to improper input validation when...

Cisco ASA Authentication Bypass by Spoofing (CVE-2023-20256)

Multiple vulnerabilities in the per-user-override feature of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to bypass a configured access control list ACL and allow traffic that should be denied to flo...