Continued Evolution of Persistence Mechanism Against Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense

CISA Known Exploited Vulnerability

Listed:

Sep 25, 2025 · federal remediation due Sep 26, 2025

Required action:

The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Ransomware use:

Unknown

KEV is a prioritization signal from CISA — remediation detail still comes from the vendor advisory.