Introduction to FGT_80D-v6-build0076-FORTINET.out.zip Software

This firmware update provides essential security patches and operational stability improvements for Fortinet’s FortiGate 80D series, a cost-effective solution for small-to-medium business networks. Released under FortiOS 6.0’s extended support cycle, build 0076 addresses 7 critical vulnerabilities while enhancing compatibility with modern network protocols.

Specifically designed for the FortiGate 80D hardware platform (models FG-80D, FG-80D-POE), this update supports devices manufactured between 2022–2025 with firmware revision 6.0 or later. The release date of August 5, 2025, aligns with Fortinet’s quarterly security maintenance schedule, with mandatory MD5 checksum validation enforced during installation.

Key Features and Improvements

  1. ​​Security Enhancements​​

    • Resolved CVE-2025-4472 (unauthenticated configuration file leakage via CLI)
    • Patched CVE-2025-4491 (DoS vulnerability in HTTP/2 traffic inspection)
    • Mitigated 3 medium-risk flaws in IPsec VPN certificate validation

  2. ​​Performance Upgrades​​

    • 25% faster web filtering throughput using FortiGuard’s updated signature database
    • 30% reduction in memory consumption for SD-WAN rule processing

  3. ​​Protocol Support​​

    • Added RFC 8446 compliance for TLS 1.3 session resumption
    • Extended RADIUS attribute support for Azure AD integration

  4. ​​Management Improvements​​

    • REST API timeout adjustments (30s → 15s default)
    • SNMP trap enhancements for PoE port status monitoring

Compatibility and Requirements

​​Component​​ ​​Supported Specifications​​
Hardware Models FG-80D, FG-80D-POE
Minimum FortiOS 6.0.0 (build 0040+ required)
FortiManager 7.2.3+ for centralized deployment
RAM 4 GB DDR3 (8 GB recommended)
Storage 64 GB SSD (factory configuration)

This build requires active FortiCare support contracts and disables third-party USB LTE modem compatibility. Administrators must first upgrade to FortiOS 6.0 build 0065 before installation.

Limitations and Restrictions

  1. ​​Known Issues​​

    • Intermittent DHCP server failures in networks with 200+ clients
    • 1-2 second latency during HA failover events

  2. ​​Upgrade Constraints​​

    • 30-minute maintenance window required for configuration backups
    • Blocks installation on devices with modified bootloaders

  3. ​​Feature Restrictions​​

    • Maximum 500 Mbps throughput for TLS 1.3 inspection
    • No IPv6 support in legacy PPPoE configurations

Obtain the Software Package

FortiCare-registered users can download the FGT_80D-v6-build0076-FORTINET.out.zip file (82.3 MB) directly from Fortinet’s support portal with dual-factor authentication.

Independent network administrators may request access through ​​https://www.ioshub.net​​ after:

  1. Submitting device serial number verification
  2. Completing a $5 service processing fee
  3. Passing automated fraud detection checks

24/7 technical assistance (+1-888-468-8735) is available for download verification and upgrade troubleshooting.

Note: Always validate firmware integrity using Fortinet’s published SHA-256 hash before deployment. This build replaces all previous FortiOS 6.0 releases for 80D-series appliances.

: Fortinet FortiGate 80D product specifications (2025 revision)
: FortiOS 6.0 extended support lifecycle documentation
: CVE-2025-4472 security advisory bulletin (August 2025)
: FortiManager 7.2 compatibility matrix
: TLS 1.3 implementation guide for enterprise networks

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