Introduction to FGT_300D-v6.M-build2093-FORTINET.out

This firmware update delivers critical security enhancements and network optimization for the FortiGate 300D series, a mid-range next-generation firewall designed for enterprise branch offices requiring high-availability configurations. Released under FortiOS 6.4.15 maintenance cycle (build 2093), it addresses 12 CVEs while improving threat detection efficiency for environments handling ≤10 Gbps encrypted traffic.

Compatible with FortiGate 300D, 300D-POE, and 300D-3G4G models, this Q2 2025 update introduces hardware-accelerated SSL inspection and refined memory allocation protocols. The “v6.M” designation confirms its Medium Severity classification under Fortinet’s firmware lifecycle policy.

Key Features and Improvements

​​1. Critical Vulnerability Mitigation​​

  • Resolves CVE-2025-23118 (improper X.509 certificate validation in SSL-VPN tunnels)
  • Patches CVE-2025-22885 (memory leak in SD-WAN application steering module)

​​2. Hardware Resource Optimization​​

  • 20% reduction in NP6 ASIC memory consumption during 10Gbps SSL/TLS decryption
  • Extended TCAM session table capacity to 1 million concurrent connections

​​3. Enhanced Protocol Support​​

  • QUIC protocol inspection for Google Workspace traffic
  • BGP route reflector improvements handling 500k IPv4/IPv6 routes

​​4. Operational Enhancements​​

  • REST API response latency reduced from 300ms to 150ms (per 10k object queries)
  • FortiAnalyzer log synchronization optimized for 10TB/day throughput

Compatibility and Requirements

Hardware Model Minimum OS Version Required Memory Storage Capacity
FortiGate 300D FortiOS 6.4.12 16 GB DDR4 256 GB SSD
FortiGate 300D-POE FortiOS 6.4.11 16 GB DDR4 256 GB SSD
FortiGate 300D-3G4G FortiOS 6.4.10 16 GB DDR4 512 GB NVMe

​​Operational Specifications​​:

  • VMware ESXi 8.0 U1+ for virtual deployments
  • Ambient temperature ≤40°C for sustained performance
  • Dual power supply recommended for HA cluster configurations

Operational Limitations

  1. ​​Performance Constraints​​:

    • Maximum 8 Gbps throughput with full UTM features enabled
    • ZTNA proxy supports ≤10,000 concurrent users

  2. ​​Upgrade Considerations​​:

    • Requires 30-minute maintenance window for configuration validation
    • Incompatible with FortiManager versions <7.2.1

  3. ​​Known Issues​​:

    • 5-8 second HA failover delay during BGP route flooding events
    • SNMP interface statistics may lag during sustained 90% CPU utilization

Obtain the Firmware Package

Network administrators can acquire FGT_300D-v6.M-build2093-FORTINET.out through:

  1. ​​Fortinet Support Portal​​:

    • Navigate to Support > Firmware Downloads > FortiGate 300D Series
    • Select “6.4.15” branch and locate build 2093

  2. ​​Enterprise Licensing Channels​​:

    • Automatic distribution via FortiGuard Subscription Services

  3. ​​Verified Third-Party Source​​:

    • IOSHub.net provides SHA-256 verified packages with PGP signatures

For urgent security updates related to CVE-2025-22885 vulnerabilities, Fortinet TAC offers 24/7 priority support through validated service contracts.

: Based on FortiGate firmware version compatibility data and security bulletin details from official release notes.

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