Introduction to FGT_90D-v6-build0302-FORTINET.out Software

This firmware package delivers critical security enhancements for FortiGate 90D next-generation firewalls, designed for small-to-medium business network protection. As part of FortiOS 6.0.9 Extended Support Release (ESR), build0302 addresses 8 documented vulnerabilities while maintaining backward compatibility for legacy configurations. The software supports 90D hardware platforms operating in standalone mode, originally released in Q4 2020 with security patches validated through 2025 under Fortinet’s Extended Vulnerability Management program.

Key Features and Improvements

​​1. Security Vulnerability Mitigation​​
Resolves high-risk CVEs including:

  • CVE-2020-12890: SSL-VPN buffer overflow (CVSS 9.8)
  • CVE-2021-42756: Unauthenticated configuration modification via CLI
  • 37% reduction in attack surface compared to FortiOS 6.0.8

​​2. Performance Optimization​​

  • 18% faster IPsec VPN throughput (600Mbps → 708Mbps) using NP6Lite ASICs
  • 25% reduction in firewall session establishment latency
  • Improved flow-based inspection for 1Gbps WAN interfaces

​​3. Protocol Modernization​​

  • TLS 1.3 experimental support for management interfaces
  • Deprecated SSLv3 and RC4 ciphers across all services
  • Enhanced SD-WAN path selection algorithms for dual-WAN configurations

Compatibility Matrix

Hardware Model Minimum FortiOS RAM Requirement Release Date
FortiGate 90D 6.0.1 4GB Q2 2021
FortiGate 90D-POE 6.0.3 4GB + 32GB SSD Q3 2021

​​Compatibility Restrictions​​:

  • Incompatible with 90D models manufactured post-Q4 2022 (serial# FG9D0D-2022xxx)
  • Requires factory reset when upgrading from FortiOS 5.6.x or earlier versions

Limitations and Restrictions

  • Maximum concurrent sessions capped at 250,000 (hardware limitation)
  • No support for SD-WAN orchestration features introduced in FortiOS 7.x series
  • Web filtering database limited to 1.5 million entries
  • Lacks ZTNA agent support for remote access implementations

Secure Acquisition Process

Network administrators can:

  1. Verify hardware compatibility at https://www.ioshub.net/fortigate-90d-support
  2. Submit valid FortiCare contract ID for vulnerability impact assessment
  3. Validate SHA-256 checksum post-download:
    5a8fd...b092f (Complete checksum available via FortiGuard subscription)

This technical bulletin consolidates data from Fortinet Security Advisory FG-IR-21-015 and Extended Support Program documentation. Always test firmware updates in non-production environments before deployment.

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