CVE-2025-20243 | Cisco Secure Firewall ASA Software - Management and VPN Web Server Operational Intel

Executive Risk Summary

"A vulnerability in the management and VPN web servers of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to improper validation of user-supplied input on an interface with VPN web services."

Operational Audit Arsenal

Target Type Firmware Image

Target Asset Cisco Secure Firewall ASA Software

Standard Path Global Firmware

Manual Verification Required

This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

High

Internal Work Notes

CVE-2025-20243: Unauthenticated DoS vulnerability in Cisco Secure Firewall ASA Software - Management and VPN Web Server, requiring firmware update

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-mfPekA6e

Related Cisco Threats

CVE-2026-20079 CVSS 10

Secure Firewall Management Center (FMC) Software

CVE-2026-20127 CVSS 10

Catalyst SD-WAN Controller - Peering Authentication

CVE-2025-20188 CVSS 10

Cisco IOS XE - Wireless LAN Controllers

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.