PT-2025-33319 · Cisco · Cisco Secure Firewall Threat Defense (Ftd)+2

Ilkin Gasimov · Published 2024-10-10 · Updated 2025-08-15 · CVE-2025-20219

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions: Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software (affected versions not specified)

Description: A vulnerability exists in the implementation of access control rules for loopback interfaces. This issue could allow an unauthenticated, remote attacker to send traffic that should have been blocked to a loopback interface. The vulnerability is due to improper enforcement of access control rules for loopback interfaces, potentially allowing an attacker to bypass configured access control rules.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2025-10988

CVE-2025-20219

Affected Products

Cisco Asa

Cisco Secure Firewall Asa

Cisco Secure Firewall Threat Defense (Ftd)

References · 5

• https://cve.org/CVERecord?id=CVE-2025-20219 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-20219 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-acl-bypass-mtPze9Yh · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-10988 · Security Note
• https://twitter.com/CVEnew/status/1956390337426977020 · Twitter Post