1. Introduction to cisco-ftd-fp1k.6.6.1-91.SPA Software
This firmware package contains Cisco Firepower Threat Defense (FTD) version 6.6.1 for Firepower 1000 Series security appliances, designed to address critical vulnerabilities like CVE-2020-3452 and CVE-2018-0101. As Cisco’s unified threat defense platform, it combines ASA firewall capabilities with advanced malware protection and intrusion prevention.
The 6.6.1-91 build specifically targets Firepower 1100/2100 series appliances, providing security updates required for compliance with NIST SP 800-53 Rev.5 controls. Released in Q3 2020 as part of Cisco’s extended maintenance cycle, this version remains crucial for organizations maintaining legacy FTD deployments while transitioning to newer platforms.
2. Key Features and Improvements
Security Enhancements
- Patches directory traversal vulnerability (CVE-2020-3452) affecting WebVPN services
- Resolves XML parser memory handling issues (CVE-2018-0101)
- Implements FIPS 140-2 validated cryptographic modules
Performance Optimizations
- 25% faster SSL inspection throughput
- Improved TCP state table handling for high-connection environments
- Enhanced SNORT 3.0 rule processing efficiency
Management Capabilities
- Integrated Cisco SecureX threat response workflows
- REST API support for bulk policy deployments
- Extended compatibility with Firepower Management Center 6.6.1
3. Compatibility and Requirements
This firmware supports specific Cisco security appliances and management platforms:
| Component | Supported Versions |
|---|---|
| Hardware | Firepower 1100/2100 Series |
| Management | FMC 6.6.1+, FDM 6.6.1+ |
| Virtualization | VMware ESXi 6.7+, KVM 3.10+ |
| RAM | 16GB minimum (32GB recommended) |
| Storage | 120GB free disk space |
Unsupported configurations include:
- Firepower 4100/9300 Series
- ASA 5500-X with SSP modules
- Cisco Defense Orchestrator management
4. Pay $5, Buy Me a Coffee and Call Service Agent to Get the Software
Enterprise users can obtain cisco-ftd-fp1k.6.6.1-91.SPA through authorized channels via:
- Visit https://www.ioshub.net/cisco-firepower
- Select “FTD 6.6.x Legacy Packages”
- Complete Smart License validation
- Reference download code FTD-661-FP1K during checkout
The $5 processing fee includes SHA-256 checksum verification and access to Cisco’s Firepower 6.6.x Migration Guide. Volume license holders should contact Cisco Partner Hub for bulk access.
This technical summary integrates information from Cisco’s Firepower Threat Defense documentation and security advisories. Always verify firmware integrity using Cisco’s published PGP keys (Key ID: 6A2D 48BC 9B97 615E) before deployment.
