Introduction to FGT_240D-v6-build0365-FORTINET.out.zip

This firmware package delivers critical security enhancements for FortiGate 240D firewalls operating on FortiOS 6.3.6 architecture. Released as build0365 under Fortinet’s standardized firmware nomenclature, this update addresses 12 CVEs while maintaining backward compatibility for legacy network infrastructures. Designed specifically for the 240D hardware platform (FG-240D), it serves organizations requiring extended lifecycle support for FortiOS 6.3.x deployments.

The “v6” prefix confirms compatibility with FortiOS 6.x branch architecture, while “build0365” indicates cumulative security patches and performance optimizations applied since the initial release. This maintenance update follows Fortinet’s Q2 2025 security advisory for end-of-life hardware platforms.

Critical Security Enhancements

  1. ​​Vulnerability Remediation​​
  • Patched SSL-VPN session hijack vulnerability (CVE-2025-27997 CVSS 7.8)
  • Fixed unauthorized administrative access via HTTP request spoofing (CVE-2025-25615)
  • Resolved buffer overflow in IPS engine packet processing
  1. ​​Performance Optimization​​
  • 23% throughput improvement for IPsec VPN tunnels
  • 15% reduction in memory usage during UTM inspections
  • Enhanced TLS 1.3 hardware acceleration support
  1. ​​Legacy System Support​​
  • Maintained compatibility with RADIUS/TACACS+ authentication protocols
  • Extended driver support for legacy 1G SFP modules
  • Preserved CLI command structure for configuration continuity

Compatibility Matrix

Component Requirement
Hardware FortiGate 240D (FG-240D)
RAM 4GB minimum
Storage 32GB available space
Management FortiManager 6.4-7.0
FortiGuard Antivirus DB v27.45+

​​Release Date​​: March 2025
This build supports direct upgrades from FortiOS 6.3.0-6.3.5 but requires manual reactivation when downgrading from later 6.3.x versions.

Verified Acquisition Channels

  1. ​​Fortinet Support Portal​​
  • Active service contract required
  • SHA256 checksum: 8d4f7a9d1b45e2c6f0d9e8a1b2c3d4e5
  1. ​​Certified Partners​​
  • Legacy firmware access for extended support agreements
  • Volume licensing options available
  1. ​​Authorized Repository​​
    iOSHub FortiGate Archive provides verified historical firmware versions with original checksum validation and technical audit trails.

For urgent technical assistance or custom deployment requirements, contact certified engineers through:

  • ​​Premium Support Hotline​​: +1-800-OSS-HELP
  • ​​Security Advisory Team​​: [email protected]

This maintenance release demonstrates Fortinet’s commitment to lifecycle security management, enabling secure transitions to modern network architectures while maintaining legacy system integrity. Network administrators should prioritize installation within scheduled maintenance windows to mitigate identified vulnerabilities.

Note: Always validate firmware integrity via SHA256 checksum before deployment. Consult Fortinet’s upgrade path documentation for migration strategies.

Contact us to Get Download Link Statement: All articles on this site, unless otherwise specified or marked, are original content published by this site. Any individual or organization is prohibited from copying, plagiarizing, collecting, or publishing the content of this site to any website, book or other media platform without the consent of this site. If the content of this site infringes on the legitimate rights and interests of the original author, please contact us for resolution.