CVE-2021-1445High· 8.6▾ TwilightMultiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.3 · likelihood 0.3 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 18.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
1.7%
Multiple vulnerabilities in Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to lack of proper input validation of the HTTPS request. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
secure_firewall_threat_defense >= 6.5.0, < 6.6.4secure_firewall_threat_defense >= 6.7.0, < 6.7.0.1adaptive_security_appliance_software >= 9.7, < 9.8.4.34adaptive_security_appliance_software >= 9.9, < 9.9.2.85adaptive_security_appliance_software >= 9.10, < 9.12.4.13adaptive_security_appliance_software >= 9.13, < 9.13.1.21adaptive_security_appliance_software >= 9.14, < 9.14.2.8adaptive_security_appliance_software >= 9.15, < 9.15.1.7Upgrade past the affected range:
secure_firewall_threat_defense 6.7.0.1adaptive_security_appliance_software 9.15.1.7Connected by shared product, vendor, weakness, or advisory.
CVE-2020-3283High· 8.6A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Firepower Threat Defense (FTD) Software when running on the Cisco Firepower 1000 Series platform could allow an unauthenticated, remote att…
CVE-2018-0231High· 8.6A vulnerability in the Transport Layer Security (TLS) library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of th…
CVE-2025-20224Medium· 5.8A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker t…
CVE-2026-20012High· 8.6A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, and Cisco Secure Firewall Threat Defense (FTD) Softwar…
CVE-2026-20052Medium· 5.8A 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. …
CVE-2026-20007Medium· 5.8A vulnerability in the Snort 2 and Snort 3 deep packet inspection of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Snort rules and allow traffic onto the network …