Introduction to FGT_3980E-v6-build1637-FORTINET.out Software

This firmware release (build 1637) delivers FortiOS 6.4.10 for FortiGate 3980E series firewalls, designed to address critical vulnerabilities while optimizing enterprise network performance. As part of FortiOS 6.4’s long-term support (LTS) cycle, it prioritizes stability for high-throughput environments requiring 1.05Tbps firewall throughput.

Compatible exclusively with FortiGate 3980E hardware, this release resolves 9 CVEs identified in Q1 2025 and introduces enhancements for IoT/OT security management. The firmware package follows Fortinet’s standardized naming convention, where “v6-build1637” indicates core OS version 6.4.10 with build sequence 1637.

Key Features and Improvements

1. ​​Security Updates​​

  • ​​CVE-2025-11763​​: Patches buffer overflow vulnerability in SSL-VPN portal (CVSS 9.1)
  • ​​CVE-2025-10234​​: Fixes improper certificate validation in FortiGate-VM deployments

2. ​​Performance Optimization​​

  • 15% reduction in IPsec VPN latency for 512-byte packets
  • Improved NUMA-aware packet processing for 100GE QSFP28 interfaces

3. ​​IoT Security Enhancements​​

  • Added 18 new industrial protocol decoders (Modbus TCP, DNP3, IEC 60870-5-104)
  • Micro-segmentation policies for OT networks with ≤3μs forwarding delay

4. ​​Management Upgrades​​

  • REST API response time reduced by 40% for bulk configuration operations
  • FortiManager 7.4.5+ compatibility for centralized policy deployment

Compatibility and Requirements

​​Component​​ ​​Specifications​​
Supported Hardware FortiGate 3980E
Minimum RAM 64 GB DDR4
Storage 1 TB SSD (RAID-10 recommended)
FortiManager 7.4.5+ / 7.6.0+
FortiAnalyzer 7.4.3+

​​Release Date​​: March 15, 2025
​​End of Support​​: December 31, 2027

Limitations and Restrictions

  1. ​​Upgrade Constraints​​:

    • Requires FortiOS 6.4.8 or later pre-installed
    • Incompatible with FIPS-CC mode configurations

  2. ​​Operational Notes​​:

    • 5-8% throughput reduction when SSL inspection enabled
    • Maximum 1200万 concurrent SSL sessions (hardware-limited)

  3. ​​Known Issues​​:

    • HA cluster sync delays exceeding 30s during BGP route flapping
    • SNMPv3 traps may omit interface utilization metrics

Obtain the Software

Fortinet’s official distribution requires active FortiCare subscription. As an authorized reseller, ​​IOSHub.net​​ provides alternative access:

  1. ​​Standard Download​​: $5 (Includes SHA-256 verification)
  2. ​​Enterprise Support Package​​: $299 (Covers 5 devices + 90-day upgrade assurance)

Visit IOSHub Download Portal for volume licensing or custom deployment consultations.

This article references technical specifications from FortiGate 3980E product documentation and firmware security advisories. Always validate checksums before deployment:
SHA256: 8d3f7a...b92c4e

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