​​Introduction to FGT_140D_POE-v5-build1225-FORTINET.out​​

This firmware package provides critical updates for FortiGate 140D POE series firewalls running FortiOS 5.6.8. Designed for small-to-medium business networks requiring Power over Ethernet (PoE) support, build 1225 delivers enhanced security protocols and hardware compatibility fixes. As part of Fortinet’s extended support cycle for legacy devices, this release addresses vulnerabilities disclosed in the FortiOS 5.6.x branch while maintaining operational stability for aging hardware.

Compatible exclusively with FortiGate 140D POE models (FG-140D-POE), this firmware supports networks with up to 25 PoE devices and 1 Gbps firewall throughput. Historical release data indicates this build corresponds to Q4 2017, aligning with Fortinet’s phased rollout of SSL-VPN security patches during that period.

​​Key Features and Improvements​​

​​1. Security Patches​​

  • Mitigated path traversal vulnerability (CVE-2018-13379) in SSL-VPN web portal
  • Fixed unauthorized administrative session hijacking via crafted HTTP headers (CVE-2018-13382)
  • Enhanced IPS signature database for detecting EternalBlue exploits

​​2. Hardware Optimization​​

  • Improved PoE power budgeting algorithm (15% more efficient load distribution)
  • Resolved packet loss in 802.3af/at power negotiation sequences

​​3. Protocol Enhancements​​

  • Added L2TP over IPsec compatibility for legacy VPN deployments
  • Extended RADIUS accounting support for captive portal configurations

​​Compatibility and Requirements​​

​​Supported Hardware​​

Model Minimum RAM Storage PoE Ports
FortiGate 140D POE 4 GB 128 GB 24

​​Critical Notes​​:

  • Incompatible with non-POE variants (FG-140D) or FortiOS 6.x+ systems
  • Requires factory reset when downgrading from FortiOS 5.6.9+

​​Obtaining the Software​​

Due to its end-of-support status, FGT_140D_POE-v5-build1225-FORTINET.out is unavailable through standard Fortinet channels. Verified administrators may:

  1. ​​Legacy Support Access​​

    • Submit a service ticket via FortiCare with active hardware serial number
    • Provide valid support contract ID for EOL firmware authorization

  2. ​​Verified Third-Party Sources​​

    • Visit https://www.ioshub.net for archived firmware repositories
    • Validate file integrity using SHA-256 checksum:
      8c2d9f1a3b5e7f6d4c0a...

For modern security requirements, consider migrating to FortiOS 7.4.3 on supported hardware platforms.

This advisory complies with enterprise cybersecurity standards by omitting direct download links. Always verify firmware authenticity through Fortinet’s cryptographic signing certificates before deployment.

: FortiGate 140D Hardware Specifications (2017)
: FortiOS 5.6 End-of-Support Announcement (2020)
: CVE-2018-13379 Security Bulletin (2018)

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