CVE-2025-20251 | Cisco Secure Firewall - Adaptive Security Appliance (ASA) Software Operational Intel

Executive Risk Summary

"A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to create or delete arbitrary files on the underlying operating system. This could cause a denial of service (DoS) condition, requiring a manual reboot to recover."

Operational Audit Arsenal

Target Type Firmware Image

Target Asset Cisco Secure Firewall ASA/FTD 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

Remote Access SSL VPN sessions could be dropped, causing a denial of service (DoS) condition

Internal Work Notes

CVE-2025-20251: Cisco Secure Firewall ASA/FTD Software vulnerability allows authenticated attackers to create or delete arbitrary files, potentially causing a DoS condition. Verify version and apply patch as recommended by Cisco.

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-http-file-hUyX2jL4

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