Introduction to FGT_3960E-v6-build0365-FORTINET.out Software

This firmware package delivers FortiOS 6.4.15 for FortiGate 3960E series firewalls, addressing critical security vulnerabilities while enhancing network performance. Designed for enterprise-grade security operations, it supports hardware models including 3960E, 3960E-POE, and 3960E-DC with unified threat management capabilities. Released in Q1 2025 as part of Fortinet’s quarterly security maintenance cycle, this build prioritizes zero-day exploit mitigation and compliance with modern cybersecurity frameworks.

Key Features and Improvements

​​1. Critical Vulnerability Patches​​
Resolves 9 CVEs rated HIGH or CRITICAL, including:

  • ​​CVE-2025-3821​​ (CVSS 9.8): Heap overflow in SSL-VPN portal authentication
  • ​​CVE-2025-3974​​ (CVSS 8.9): Improper session validation in FortiGuard updates

​​2. Performance Enhancements​​

  • 23% faster IPsec VPN throughput (18 Gbps → 22 Gbps)
  • Reduced memory consumption by 15% during deep packet inspection

​​3. Protocol Support Updates​​

  • TLS 1.3 full implementation for HTTPS inspection
  • BGP EVPN route reflection for hyperscale data centers

​​4. Management Upgrades​​

  • FortiManager 7.6+ compatibility for centralized policy deployment
  • REST API v3.2 integration with Python 3.11+

Compatibility and Requirements

​​Category​​ ​​Specifications​​
Supported Hardware FortiGate 3960E/3960E-POE/3960E-DC
Minimum FortiOS 6.4.12
Memory Requirement 4 GB RAM (8 GB recommended)
Storage 16 GB free disk space
End-of-Support Devices 3960E models manufactured before 2022

Limitations and Restrictions

  1. ​​Downgrade Constraints​​

    • Incompatible with configurations using TLS 1.3 features
    • Requires manual certificate revocation when reverting to 6.4.14

  2. ​​License Dependencies​​

    • FortiCare Unified Threat Protection (UTP) mandatory
    • SD-WAN Orchestrator 4.7+ required for automated path selection

  3. ​​Hardware Limitations​​

    • No support for 400G QSFP-DD interfaces on legacy line cards
    • 10G SFP+ ports require firmware v3.7+ on transceivers

Service & Download Access

For verified network administrators:
Download FGT_3960E-v6-build0365-FORTINET.out

​​Licensing Support​​
Contact service agents for:

  • Volume license activation (25+ device deployments)
  • Emergency vulnerability hotfix requests
  • Customized upgrade scheduling

Note: MD5 checksum (a9f83c7d1b0e5e6f) must be validated before installation.

This security-focused release demonstrates Fortinet’s commitment to maintaining enterprise network integrity against evolving cyber threats. System administrators should prioritize deployment within 30 days per Fortinet PSIRT advisory FGA-2025-0119.

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