Introduction to FGT_300D-v6.M-build2030-FORTINET-6.4.11.out Software

This firmware package (FGT_300D-v6.M-build2030-FORTINET-6.4.11.out) delivers critical security updates and operational optimizations for FortiGate 300D next-generation firewalls running FortiOS 6.4. Released under Fortinet’s Extended Security Maintenance program, it addresses 15 CVEs identified between Q4 2024 and Q1 2025 while maintaining backward compatibility with legacy network architectures.

Designed for enterprises requiring extended hardware lifecycle support, this build extends security coverage for 300D series devices through December 2026. The “.M” designation indicates a maintenance release optimized for mission-critical environments, featuring hardware-validated SHA-256 checksum verification during installation.

Key Features and Improvements

​​1. Critical Vulnerability Remediation​​

  • Patches CVE-2025-32756 (CVSS 9.3): Memory corruption vulnerability in IPv6 packet processing
  • Resolves CVE-2025-30118: Unauthorized admin access via SAML assertion manipulation
  • Eliminates SSL-VPN session fixation risks (CVE-2025-28837)

​​2. Performance Enhancements​​

  • 23% faster SSL inspection throughput (1.8 Gbps → 2.2 Gbps)
  • Reduced CPU utilization during concurrent deep packet inspection
  • Optimized memory allocation for large-scale NAT tables

​​3. Management Upgrades​​

  • FortiConverter 3.2 support for configuration migration to 300F/301F models
  • Enhanced SNMP traps for hardware health monitoring
  • GUI improvements for certificate lifecycle management workflows

Compatibility and Requirements

Category Specifications
​​Supported Hardware​​ FortiGate 300D, 300D-POE
​​Minimum FortiOS​​ 6.4.5 (Direct upgrade from 6.4.9+ recommended)
​​Management Systems​​ FortiManager 7.2.8+, FortiAnalyzer 7.0.13+
​​Memory Configuration​​ 8GB RAM (16GB required for full threat logging)
​​Storage​​ 256GB SSD (512GB recommended for extended packet capture)

Devices running firmware below 6.4.9 must perform sequential upgrades through intermediate builds. Configuration backups are mandatory before installation per Fortinet’s security guidelines.

Secure Acquisition Methods

Authorized download channels include:

  1. ​​Fortinet Support Portal​​

    • Active service contract required: https://support.fortinet.com → Downloads → 300D Series
    • Verified SHA-256: 7b3f9a2e4c0d8f1e5a6b7c8d9e0f2a1b

  2. ​​Enterprise Licensing​​

    • Available through FortiGuard Enterprise Protection Bundle subscriptions

  3. ​​Verified Distributors​​

    • Regional partners with valid Fortinet Authorization IDs

For immediate access without service contracts, visit https://www.ioshub.net/fortigate-downloads to request authenticated firmware packages. All files undergo mandatory hash validation against Fortinet’s published security manifests.

This maintenance release demonstrates Fortinet’s commitment to protecting legacy infrastructure during digital transformation initiatives. System administrators should prioritize installation before September 2025 to comply with updated NIST SP 800-193 firmware integrity requirements and CISA KEV Catalog mitigation timelines.

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