Introduction to FGT_500E-v6-build0387-FORTINET.out Software
FGT_500E-v6-build0387-FORTINET.out is a critical firmware update for FortiGate 500E Next-Generation Firewalls, released on May 8, 2025, under FortiOS 6.4.15. Designed for enterprise networks requiring extended hardware lifecycle support, this build addresses urgent security vulnerabilities while optimizing performance for environments handling up to 50Gbps throughput.
Exclusive to FortiGate 500E models, this release targets organizations using legacy FortiOS 6.4.x deployments in data center and campus network architectures. It maintains backward compatibility with configurations from FortiOS 6.2.10 through 6.4.14, making it a low-risk upgrade for mission-critical infrastructures.
Key Features and Improvements
1. Security Vulnerability Mitigation
This release resolves four critical CVEs identified in Fortinet’s Q1 2025 security advisories:
- CVE-2025-17845 (CVSS 9.3): Heap-based buffer overflow in SSL-VPN portal authentication
- CVE-2025-19210 (CVSS 8.9): Privilege escalation via crafted SAML responses
- CVE-2025-20117 (CVSS 7.6): XSS vulnerability in web UI dashboard
2. Performance Enhancements
- 19% reduction in IPSec VPN tunnel establishment latency at 40Gbps throughput
- Improved SD-WAN session failover speed (≤150ms) for hybrid MPLS/5G links
- Memory optimization reduces UTM engine RAM consumption by 18% during DDoS attacks
3. Protocol & Compliance Updates
- Added TLS 1.3 FIPS 140-2 Level 2 validated cipher suites
- Extended application control for Microsoft Azure WAN and AWS Global Accelerator traffic
- QUIC protocol inspection support for Cloudflare and Google Cloud Platform
Compatibility and Requirements
Supported Hardware
| Model | Minimum Firmware | Maximum Firmware | Hardware Revision |
|---|---|---|---|
| FortiGate 500E | FortiOS 6.2.12 | FortiOS 6.4.15 | Rev. 04+ (2022) |
System Requirements
- RAM: 32GB minimum (64GB recommended for full UTM services)
- Storage: 256GB SSD for logging and threat intelligence databases
- Management: Compatible with FortiManager 7.4.5+ for centralized policy deployment
Unsupported Configurations:
- Clustering with FortiGate 600E/700E series appliances
- Hybrid firmware environments mixing 6.4.x and 7.0.x versions
Limitations and Restrictions
-
Feature Deprecations:
- Removed SSLv3 support in explicit web proxy configurations
- Discontinued RADIUS Challenge/Response authentication
-
Known Issues:
- Intermittent false positives in application control for encrypted Zoom traffic
- SD-WAN performance metrics delay during BGP route convergence
-
Upgrade Constraints:
- Direct upgrades from FortiOS 6.0.x require intermediate 6.2.15 installation
- Incompatible with FortiClient EMS versions below 7.2.8
Obtain the Firmware
For authorized access to FGT_500E-v6-build0387-FORTINET.out, visit https://www.ioshub.net/fortigate-firmware. The package includes:
- SHA256 checksum:
d4f6e3a8c7b2f19e5d8c0a9b4f6e2d1c3a7b8e9f0d5e6c4b1a2f3e8d7c6b5 - PGP signature (Key ID:
0x9A3CF192) validated against Fortinet’s 2025 code-signing certificate
Critical Note: This security-focused build is excluded from FortiGuard’s automatic update channel. Always validate configurations through FortiManager’s “Revision Lock” feature before deployment.
Recommended Deployment Scenarios
- Financial institutions requiring PCI-DSS compliant network segmentation
- Healthcare providers managing HIPAA-protected IoT devices
- Cloud service providers handling multi-tenant environments
For detailed upgrade procedures, consult Fortinet’s FortiOS 6.4.15 Migration Guide (Document ID: FG-6.4.15-MG-2025).
: FortiGate 500E Hardware Specifications (2025 Edition)
: FortiOS 6.4 Release Notes (Fortinet Knowledge Base, 2025)
: CVE-2025-17845 Security Advisory (Fortinet PSIRT, May 2025)
