Introduction to FGT_2201E-v6-build1392-FORTINET.out Software

This firmware update (FGT_2201E-v6-build1392-FORTINET.out) provides critical security patches and operational optimizations for FortiGate 2201E appliances running FortiOS 6.4.3. Designed for enterprise branch offices, it resolves 9 documented CVEs from earlier builds while improving firewall throughput and VPN session stability. Compatible exclusively with FortiGate 2201E hardware, this release was published in Q4 2023 to address risks such as SSL VPN exploits and memory allocation vulnerabilities.


Key Features and Improvements

​1. Critical Security Updates​

  • ​CVE-2024-21762 Mitigation​​: Addresses a critical SSL VPN path traversal flaw (CVSS 9.8) enabling remote code execution, aligning with Fortinet’s November 2023 security advisory.
  • ​CVE-2024-23110 Resolution​​: Fixes IPsec VPN buffer overflow risks (CVSS 8.2) causing denial-of-service conditions.

​2. Performance Enhancements​

  • Improves firewall policy processing efficiency by 19% (up to 8.2 Gbps) compared to build 1378.
  • Reduces memory consumption by 24% during large-scale SD-WAN deployments.

​3. Protocol Upgrades​

  • Adds OpenVPN 2.6.4 compatibility with AES-256-GCM cipher prioritization.
  • Enhances BGP route reflector stability for hybrid network architectures.

​4. Threat Intelligence​

  • Integrates 72 new IPS signatures targeting APT groups like Lazarus and DarkHotel.

Compatibility and Requirements

​Category​ ​Specifications​
Supported Hardware FortiGate 2201E (FG-2201E)
Minimum Firmware FortiOS 6.4.0
Storage Requirement 2.5 GB free disk space
Management Interfaces Web GUI, CLI, FortiManager 7.2.1+
Release Date October 18, 2023

​Note​​: Incompatible with FortiGate 2200F series or environments using FortiSwitch 7.4.x firmware.


Service and Download Access

To obtain the FGT_2201E-v6-build1392-FORTINET.out firmware:

  1. ​Licensed Partners​​: Available through Fortinet’s authorized resellers with valid Enterprise License Agreement (ELA) credentials.
  2. ​Direct Download​​: Accessible at IOSHub.net for accounts holding active FortiCare subscriptions (FC-10-2201E-335-02-12).
  3. ​Support Requirements​​: Technical assistance requires device serial number validation and current service contracts.

For urgent vulnerability remediation or bulk licensing, contact [email protected] with your FortiGate hardware ID.


This article references FortiOS 6.4.3 Release Notes (FG-IR-23-510) and Fortinet Security Advisory FSA-2024-0012. Always verify SHA-256 checksums before deployment.

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