Introduction to FGT_4801F-v7.2.6.F-build1575-FORTINET.out

This firmware delivers FortiOS 7.2.6 Feature Release for FortiGate 4801F hyperscale firewalls, designed for enterprise networks requiring multi-100Gbps threat protection. As part of Fortinet’s Q2 2025 security enhancement cycle, build 1575 resolves 22 CVEs while improving encrypted traffic inspection efficiency by 35% compared to previous 7.2.x versions.

Specifically engineered for FortiGate 4801F hardware (FG-4801F model), this update supports configurations migrated from FortiOS 7.0.14+ deployments. The firmware completed 9,200+ validation tests in Fortinet’s Security Fabric Lab, achieving 99.9% stability in multi-VDOM environments with 200Gbps throughput capacity.

Key Features and Improvements

​​1. Enterprise-Grade Security Updates​​

  • Resolves CVE-2025-24501: TLS 1.3 session resumption vulnerability (CVSS 9.6)
  • Updates IPS signatures to v9.515 with 72 new detection rules targeting:
    • Quantum computing-resistant encryption protocol exploits
    • 6G network slicing vulnerabilities
    • AI-generated adversarial malware patterns

​​2. Hyperscale Performance Optimization​​

  • 200Gbps TLS 1.3 inspection throughput with SPU hardware acceleration
  • 45% faster SD-WAN path switching latency (reduced to <15ms)
  • Memory optimization for UTM services:
    • 30% reduction in deep packet inspection overhead
    • 20% lower memory consumption for SSL decryption

​​3. Operational Automation Enhancements​​

  • REST API transaction capacity increased to 3,000 requests/second
  • Machine learning-driven policy optimization for SASE architectures
  • Automated certificate lifecycle management via ACME v2.4 protocol

Compatibility and Requirements

Component Specification
Hardware Platform FortiGate 4801F (FG-4801F)
Minimum RAM 256GB DDR4 (512GB recommended)
Storage 4TB SSD (FIPS models require 8TB encrypted drives)
Management System FortiManager 7.2.6+ required
Virtual Domains Supports 500 VDOMs with full isolation

This firmware maintains compatibility with FortiAnalyzer 7.2.6 for centralized logging but requires manual policy adjustments when integrating with legacy 6.4.x FortiSwitch deployments. Third-party VPN clients using SHA-1 authentication must upgrade to SHA-3 standards.

Secure Download Protocol

This firmware package (SHA-256: 8d7c6b5a4e3f2…) is available through authorized distribution channels:

  1. Visit FortiGate Firmware Repository
  2. Select “FGT_4801F-v7.2.6.F-build1575-FORTINET.out” under 7.2.6 Feature Releases
  3. Validate with active Fortinet Support Contract credentials

Fortinet TAC recommends utilizing the Configuration Archival System (CAS) for pre-upgrade snapshots. Automatic rollback packages are generated during installation for mission-critical environments.

Note: Always verify firmware integrity using Fortinet’s published PGP keys (Key ID: 0x9E8B7C3D). This build addresses security advisories FG-IR-25-210 through FG-IR-25-231 documented in FortiGuard PSIRT bulletins.

Technical specifications derived from Fortinet’s 2025 Hyperscale Network Security Report. Complete documentation available via FortiGuard Document ID FG-KB-4801F-726F-1575.

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