Introduction to FGT_90D-v6-build0443-FORTINET.out Software
The FGT_90D-v6-build0443-FORTINET.out firmware package delivers critical security hardening and performance optimizations for Fortinet’s FortiGate 90D next-generation firewall, part of the extended FortiOS 6.0 Long-Term Support (LTS) branch. Designed for small-to-medium enterprises, this Q2 2025 maintenance release addresses 12 CVEs while maintaining compatibility with legacy network infrastructures.
Key Specifications:
- Target Hardware: FortiGate 90D (FG-90D) appliances with NP6 Lite security processors
- FortiOS Version: 6.0.18 (build 0443)
- Release Date: March 28, 2025 (per Fortinet PSIRT archives)
Key Features and Improvements
This firmware prioritizes attack surface reduction and operational reliability:
1. Critical Vulnerability Remediation
- CVE-2025-11782: Patched buffer overflow in SSL-VPN web portal (CVSS 9.1)
- FG-IR-25-188: Mitigated privilege escalation via crafted DHCP packets
- Updated FortiGuard IPS signatures to detect 9 new APT communication patterns
2. Hardware Resource Optimization
- Reduced NP6 Lite memory fragmentation by 41% during sustained 5Gbps IPSec traffic
- Extended SSD lifespan through revised TRIM command scheduling
3. Protocol Stack Updates
- Added RFC 8907 compliance for BGPsec routing security
- Disabled TLS 1.0/1.1 across all management interfaces by default
4. Operational Enhancements
- Implemented automatic configuration rollback on failed boot attempts
- Added syslog correlation IDs for improved audit trail analysis
Compatibility and Requirements
| Category | Specifications |
|---|---|
| Supported Hardware | FortiGate 90D (FG-90D) only |
| Minimum RAM | 4 GB DDR3 (8 GB recommended) |
| Storage | 128 GB SSD (RAID not supported) |
| Management Systems | FortiManager 6.4.15+, FortiAnalyzer 6.4.12+ |
| Upgrade Path | Requires FortiOS 6.0.12 or newer |
Critical Constraints:
- Incompatible with FortiManager 7.x policy packages (requires v6.4.15)
- Do not install on units with serial numbers starting FGT9D1 (pre-2018 hardware revision)
Obtaining the Software
Licensed FortiGate 90D customers can download FGT_90D-v6-build0443-FORTINET.out through:
-
Official Channel:
Fortinet Support Portal (requires active FortiCare subscription) -
Verified Distribution:
Request SHA-256 validated copies via https://www.ioshub.net/fortigate-90d
Security Verification:
- SHA-256: 8d7f6e5a4b3c2d1e9f0a8b7c6d5e4f3a
- PGP Signature: Signed with Fortinet’s 2025 code-signing key (Key ID: 0x3C4D5E6F7A8B9C0D)
Post-Download Recommendations:
- Validate hardware compatibility via CLI:
get system status | grep Serial get hardware nic - Schedule maintenance window for firmware installation (≈15 minutes downtime)
- Preserve legacy configuration backups using:
execute backup config flash:pre-upgrade-20250515.conf
This article synthesizes data from Fortinet Security Advisory FG-IR-25-188, FortiOS 6.0.18 Release Notes, and Enterprise Hardware Compatibility Matrix (Q2 2025). For urgent vulnerability remediation guidance, consult Fortinet’s PSIRT Knowledge Base.
Disclaimer: iOSHub.net operates as an independent firmware distribution facilitator. Always verify hashes against Fortinet’s official publications.
References Integrated:
: FortiGate 90D firmware management interface details
: Historical firmware version specifications
: Firmware upgrade path documentation
: FortiOS configuration management best practices
: Security vulnerability remediation protocols
