What’s Vulnerable › Vulnerabilities
CVE-2025-20219: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Bypass Vulnerability
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-08-14 · updated 2026-06-17
- Weakness: CWE-284
Description
A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to send traffic that should have been blocked to a loopback interface. This vulnerability is due to improper enforcement of access control rules for loopback interfaces. An attacker could exploit this vulnerability by sending traffic to a loopback interface on an affected device. A successful exploit could allow the attacker to bypass configured access control rules and send traffic that should have been blocked to a loopback interface on the device.
Affected products
- Cisco ASA Software: 9.18.2, 9.18.2.5, 9.18.2.7, 9.19.1, 9.18.2.8, 9.18.3 (+38)
- Cisco Firepower Threat Defense Software: 7.3.0, 7.3.1, 7.3.1.1, 7.4.0, 7.4.1, 7.4.1.1 (+4)
References
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