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CVE-2026-20105

Secure Firewall - Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software

Cisco CVSS 7.7 Updated March 16, 2026

Executive Risk Summary

"A vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker to exhaust device memory resulting in a denial of service (DoS) condition. This vulnerability is due to trusting user input without validation, which could allow an attacker to cause the device to reload, resulting in a DoS condition."

Operational Audit Arsenal

Target Type Firmware
Target Asset Cisco Secure Firewall ASA/FTD Software
Standard Path Remote Access SSL VPN server

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-2026-20105: Potential DoS vulnerability in Cisco Secure Firewall ASA/FTD Remote Access SSL VPN, requiring immediate patching and verification of firmware versions.

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Related Cisco Threats

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