CVE-2025-20219
published 2025-08-14CVE-2025-20219: A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and…
PriorityP433medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.38%
30.6th percentile
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
55 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | cisco_adaptive_security_appliance_software | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vendor_cisco5.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
vendor_cisco·2025-08-14·CVSS 5.3
CVE-2025-20219 [MEDIUM] CWE-284 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
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 b
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20219 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
CVE-2025-20219: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Access Control Rules Bypass Vulnerability
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
GHSA
GHSA-8x2f-w8fv-gqcm: A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Softw
ghsa_unreviewed·2025-08-14
CVE-2025-20219 [MEDIUM] CWE-284 GHSA-8x2f-w8fv-gqcm: A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Softw
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-08-14
Published