CISCO Security Advisory
Published Date: Not specified
CVE: CVE-2026-20329
Advisory Summary
🔶 📌 Cisco Secure Firewall ASA/FTD/FMC Hardening Release — September 2026 (Critical)
- Cisco released software hardening updates for Cisco Secure Firewall ASA, Secure Firewall Threat Defense (FTD), and Secure Firewall Management Center (FMC).
- The release addresses multiple internally discovered vulnerabilities; two are reported as actively exploited in the wild.
- Security impact rating: Critical
- Affected CVEs: CVE-2026-20329 through CVE-2026-20336 (as grouped under Cisco’s CWE-based disclosure approach)
- FMC Static Credential Exposure (credential-related risk that can enable account misuse)
- FMC Authentication Bypass (control-plane compromise risk; may allow unauthorized access/management)
- No workarounds are provided, which increases operational urgency: mitigation generally requires patching/upgrading.
- Look for suspicious FMC authentication patterns and credential use anomalies
- Review management-plane logs and recent admin/session activity around the estimated compromise window
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-2026
Reference: Vendor Advisory