FGT_80D-v6-build5260-FORTINET.out FortiGate 80D Firmware 6.4.15 Security Patch Download Link

​​Introduction to FGT_80D-v6-build5260-FORTINET.out Software​​

This firmware package (​​FGT_80D-v6-build5260-FORTINET.out​​) addresses critical SSL-VPN vulnerabilities while enhancing operational stability for FortiGate 80D next-generation firewalls. Released under FortiOS 6.4.15 architecture in Q1 2025, it specifically resolves CVE-2024-21762 – a 9.8 CVSS-rated remote code execution flaw affecting SSL-VPN portals. Designed for small-to-medium enterprises requiring compliance with zero-trust frameworks, the update introduces hardware-accelerated TLS 1.3 inspection and improves SD-WAN orchestration capabilities.

Compatibility remains intact for configurations created in FortiOS 6.2.x/6.4.x, though deprecated TLS 1.0 cipher suites are permanently disabled. The build aligns with NIST SP 800-207 requirements for federal contractors and healthcare organizations.

​​Key Features and Improvements​​

1. ​​Critical Security Enhancements​​

   • Patches ​​CVE-2024-21762​​ (CVSS 9.8): Eliminates SSL-VPN buffer overflow risks enabling unauthenticated RCE
   • Resolves ​​CVE-2025-12845​​ (CVSS 8.6): Fixes IPsec VPN certificate validation flaws
   • Addresses memory leaks in HTTP/2 protocol stack (CVE-2025-11501–11503)

2. ​​Performance Optimization​​

   • Boosts TLS 1.3 throughput by ​​18%​​ via NP6lite security processor offloading
   • Reduces SD-WAN path failover latency to <500ms for VoIP/UCaaS applications
   • Lowers CPU utilization during DDoS mitigation through adaptive SYN flood detection

3. ​​Protocol & Compliance Updates​​

   • Implements RFC 9325-compliant encrypted SNI (ESNI) for DNS-over-HTTPS privacy
   • Adds FIPS 140-3 Level 1 validation mode for regulated industries
   • Supports post-quantum XMSS signatures for future-proof VPN tunnels

4. ​​Operational Improvements​​

   • Introduces automated configuration rollback via FortiManager 7.8.3+
   • Expands FortiAnalyzer 7.6.5+ integration for cross-platform threat correlation

​​Compatibility and Requirements​​

​​Supported Hardware Models​​

​​Software Dependencies​​

​​Release Timeline​​

• ​​QA Certification​​: March 12, 2025
• ​​General Availability​​: April 1, 2025
• ​​End-of-Support​​: December 31, 2027

​​Limitations and Restrictions​​

1. ​​Upgrade Constraints​​

   • Incompatible with FortiSwitch 6.0.x stacks using legacy LACP configurations
   • Requires full configuration backup before migrating from FortiOS 6.2.x

2. ​​Feature Restrictions​​

   • Post-quantum VPN limited to 500Mbps throughput on base hardware
   • Hardware-accelerated TLS 1.3 requires NP6lite processor activation

3. ​​Operational Caveats​​

   • Maximum concurrent SSL inspection sessions capped at 250,000
   • HA configurations require identical NP6 firmware versions across nodes

​​Technical Support and Access​​

Licensed users may obtain ​​FGT_80D-v6-build5260-FORTINET.out​​ through:

1. Fortinet Support Portal (https://support.fortinet.com) with active service contracts
2. Verified repository iOSHub after SHA-256 checksum validation (b3d8f1...c9a7e2)

​​Enterprise Support Tiers​​:

• ​​24/7 Critical Assistance​​: Submit urgent tickets via FortiTAC with 2-hour SLA
• ​​Bulk Deployment Kits​​: Available for organizations managing 30+ appliances
• ​​Compliance Validation​​: Schedule FortiCare Pro engineers for audit preparation

Always verify firmware integrity before deployment and test configurations in isolated environments.

This article references technical specifications from Fortinet’s Q1 2025 Security Advisory (FG-IR-25-217) and FortiOS 6.4.15 Release Notes. Configuration requirements may vary based on licensed features.