Firepower Threat Defense Software
CVE-2026-20064
MEDIUM
Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Primary rating from Vendor (cisco) · only source for this CVE.
CVSS VectorVendor: cisco
Lifecycle Timeline
2DescriptionCVE.org
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 vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
AnalysisAI
Cisco Secure Firewall Threat Defense (FTD) devices can be forcibly rebooted by authenticated local attackers through improper input validation in CLI commands, resulting in denial of service. This vulnerability affects low-privileged accounts and requires no user interaction to exploit. No patch is currently available.
Technical ContextAI
Classified as CWE-476 (NULL Pointer Dereference). 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 vulnerability by using crafted commands at the CLI prompt. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS
RemediationAI
Monitor vendor advisories for a patch.
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Unauthenticated remote attackers can trigger a denial of service against Cisco Secure Firewall ASA and FTD devices by se
Cisco Secure Firewall ASA and Secure FTD devices can be remotely rebooted by unauthenticated attackers through malformed
Denial of service in Cisco Secure Firewall ASA and FTD Remote Access SSL VPN allows unauthenticated remote attackers to
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A vulnerability in the Cisco Adaptive Security Appliance (ASA) restore functionality that is available in Cisco ASA Soft
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
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External POC / Exploit Code
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