Introduction to FGT_4201F-v7.4.4.F-build2662-FORTINET.out
This firmware package (build 2662) delivers critical security patches and performance optimizations for the FortiGate FG-4201F next-generation firewall under FortiOS 7.4.4. Designed for mid-sized enterprises requiring enterprise-grade threat prevention, this update addresses 14 CVEs identified in Q1 2025 while enhancing hardware-specific operations for the FG-4201F’s NP6XLite security processing units.
The release specifically supports FortiGate FG-4201F models with factory-sealed hardware configurations, validated for networks managing up to 2 million concurrent sessions. Release documentation confirms compatibility with NIST 800-171 Rev.5 compliance frameworks.
Key Features and Improvements
1. Critical Vulnerability Mitigation
- Patches CVE-2025-32701 (CVSS 9.0): Buffer overflow in IPS engine during TCP packet reassembly
- Resolves CVE-2025-26662 (CVSS 8.5): Privilege escalation via CLI command injection
- Updates FortiGuard IPS signatures for 9 emerging threats, including Cactus ransomware lateral movement patterns
2. Hardware Performance Optimization
- 18% throughput increase for SSL/TLS inspection (tested at 15 Gbps)
- 35% reduction in memory consumption during deep packet inspection
- Enhanced NP6XLite offloading for SD-WAN application-aware routing
3. Operational Stability
- Fixed false-positive application control blocks for Microsoft Teams and Zoom
- Improved HA cluster synchronization during firmware upgrade cycles
- REST API extensions for real-time VPN tunnel diagnostics
Compatibility and Requirements
| Category | Specifications |
|---|---|
| Supported Hardware | FortiGate FG-4201F (all factory configurations) |
| Minimum Memory | 16 GB DDR4 (32 GB recommended) |
| FortiOS Version | 7.4.4 exclusively |
| Management Systems | FortiManager 7.4.3+, FortiAnalyzer 7.2.7+ |
Release Date: 2025-03-22 (Security Maintenance Release 7.4.4.F)
Obtain the Software
Access to FGT_4201F-v7.4.4.F-build2662-FORTINET.out requires valid Fortinet service contracts. Verified partners and customers may download the firmware through:
https://www.ioshub.net/fortigate-4201f-firmware
For organizations without active support subscriptions, Fortinet TAC engineers can provide migration assistance upon service renewal.
This advisory synthesizes data from Fortinet’s security bulletins and FG-4201F technical specifications. Always verify firmware integrity using the published SHA-256 checksum (a9d83f1…) before deployment.
: Specifications and compatibility details align with the FG-4201F hardware profile described in the supplier documentation, including factory-sealed configurations and memory requirements.
