Cisco Secure Firewall Threat Defense vulnerabilities
276 published vulnerabilities in Cisco Secure Firewall Threat Defense, 13 of them exploited in the wild. The most were published in 2020 (53), and 39 so far in 2026.
Cisco Secure Firewall Threat Defense vulnerabilities by year
2017
2018
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2020
2021
2022
2023
2024
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2026
Most exploited Cisco Secure Firewall Threat Defense vulnerabilities
- CVE-2021-44228 Apache Log4j2 Remote Code Execution
- CVE-2025-20333 Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow
- CVE-2026-20349 Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection
- CVE-2024-20353 Cisco ASA and FTD Denial of Service
- CVE-2023-44487 HTTP/2 Rapid Reset Attack
- CVE-2020-3452 Cisco ASA and FTD Read-Only Path Traversal
- CVE-2020-3259 Cisco ASA and FTD Information Disclosure
- CVE-2018-0296 Cisco Adaptive Security Appliance (ASA) Denial-of-Service
- CVE-2025-20362 Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization
- CVE-2020-3580 Cisco ASA and FTD Cross-Site Scripting (XSS)
- CVE-2024-20359 Cisco ASA and FTD Privilege Escalation
- CVE-2024-20481 Cisco ASA and FTD Denial-of-Service
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