secure firewall threat defense vulnerabilities and fixes

Recent CVEs affecting secure firewall threat defense, with upgrade or downgrade steps. 1 tracked.

Also searched as: securefirewallthreatdefense.

secure firewall threat defense has 1 tracked vulnerability, 0 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 1. Most recent: 2026-08-11. Highest priority: CVE-2026-20349 (score 76/100).

• CVE-2026-20349 HIGH 8.6 EXPLOITED MITIGATE DOWNGRADE Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability

FAQ

How do I fix secure firewall threat defense vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is secure firewall threat defense being exploited right now?

Yes: 1 secure firewall threat defense CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Which secure firewall threat defense CVE should I patch first?

CVE-2026-20349 currently ranks highest (76/100): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability.

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