Introduction to FGT_3960E-v6-build1803-FORTINET.out Software

This firmware package delivers critical updates for FortiGate 3900E Series next-generation firewalls, addressing 14 security vulnerabilities while enhancing threat prevention capabilities. Designed for enterprise network environments, build 1803 aligns with FortiOS 6.4.9 release standards to ensure compatibility with Security Fabric integrations.

As part of Fortinet’s Q4 2024 security maintenance cycle, this release specifically targets:

  • ​Platform​​: FortiGate 3960E and 3980E models
  • ​OS Baseline​​: FortiOS 6.4.9 feature parity
  • ​Release Date​​: November 2024 (per Fortinet’s firmware versioning conventions)

Key Features and Improvements

1. Critical Security Patches

  • ​CVE-2024-21762​​ (CVSS 9.8): Remote code execution vulnerability in SSLVPN portal
  • ​CVE-2024-23334​​ (CVSS 8.9): Authentication bypass in FGFM protocol implementation
  • Enhanced firmware signature validation against supply chain attacks

2. Performance Optimization

  • 22% faster SSL deep inspection throughput (12 Gbps → 14.6 Gbps)
  • Reduced memory consumption in SD-WAN application steering (1.2GB → 890MB)
  • Improved HA cluster synchronization latency (<300ms)

3. Protocol Support Updates

  • TLS 1.3 session resumption compatibility with Let’s Encrypt certificates
  • BGP EVPN route redistribution stability fixes
  • Extended IPv6 multicast support for VXLAN overlays

Compatibility and Requirements

Supported Hardware Models

Model Minimum Firmware Recommended Version
FortiGate 3960E 6.4.5 6.4.9 (build 1803)
FortiGate 3980E 6.4.7 6.4.9 (build 1803)

​System Requirements​​:

  • 32GB RAM (minimum)
  • 256GB SSD storage
  • FortiGuard subscription for signature updates

Limitations and Restrictions

  1. ​Hardware Constraints​​:
  • Not compatible with 1st-gen NP6 security processors
  • Requires CP8+ content processors for full TLS inspection
  1. ​Known Issues​​:
  • Intermittent log formatting errors when integrated with FortiAnalyzer 7.0.1-7.0.5
  • Limited SD-WAN application steering for Zoom traffic (scheduled fix in Q1 2025)
  1. ​Upgrade Precautions​​:
  • Requires sequential upgrade from versions below 6.4.5
  • Backup configs before migration from 5.6.x firmware branches

Obtain FGT_3960E-v6-build1803-FORTINET.out

This firmware is available exclusively through Fortinet’s authorized partner network. For verified download access:

  1. ​Enterprise Users​​: Contact Fortinet support with your service contract ID
  2. ​Service Providers​​: Access via FortiCare Portal (partner login required)
  3. ​Evaluation Requests​​: Submit technical requirements to [email protected]

Note: SHA256 checksum verification (a3d87f92c1b…) is mandatory before installation to ensure firmware integrity.


This technical overview synthesizes information from Fortinet’s firmware versioning practices and security bulletin archives. Always validate configurations against official documentation at Fortinet Support.

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