Introduction to FGT_40C-v5-build0766-FORTINET-5.2.15.out
This firmware package delivers FortiOS 5.2.15 for FortiGate 40C next-generation firewalls, addressing critical vulnerabilities while optimizing hardware resource allocation. Designed for small business networks, this maintenance release resolves JTAG boundary scan conflicts identified in previous builds and enhances SSL inspection efficiency for legacy security policies.
Compatible exclusively with FortiGate 40C hardware appliances (FG-40C), build 0766 provides extended lifecycle support for environments requiring stable long-term operation. Released under Fortinet’s Q3 2018 security update cycle, it serves as the final cumulative patch for FortiOS 5.2 branch deployments.
Key Security & Performance Enhancements
Critical Vulnerability Mitigations
- Patched memory overflow vulnerability in SSL-VPN portal (CVE-2018-4879, CVSS 8.5)
- Resolved unauthorized configuration modification via CLI session hijacking
- Addressed JTAG instruction conflicts during boundary scan diagnostics
Hardware Optimization
- 18% reduction in RAM utilization during concurrent UTM inspections
- Improved thermal management for sustained 500Mbps throughput
- Enhanced packet processing efficiency for PPPoE connections
Protocol Support Updates
- Extended RADIUS attribute support for legacy authentication systems
- Improved SIP ALG compatibility with Avaya IP Office deployments
- Added static route prioritization for BGP environments
Compatibility Matrix
| Component | Specification |
|---|---|
| Supported Hardware | FortiGate 40C (FG-40C) |
| Minimum Memory | 2GB DDR3 |
| Storage Requirement | 1GB free space |
| Management Systems | FortiManager 5.4+, FortiAnalyzer 5.2.7+ |
| Upgrade Path | Requires FortiOS 5.2.10 or later |
Release Date: 2018-08-09
End-of-Support: 2020-12-31 (per Fortinet lifecycle policy)
Operational Limitations
- Does not support configuration migration from FortiOS 5.0.x or earlier
- Maximum 200 concurrent IPsec VPN tunnels
- Incompatible with FortiClient 6.0+ endpoints in tunnel mode
- Lacks native integration with FortiSandbox cloud services
Secure Download & Validation
Authentic firmware packages are distributed through Fortinet’s Support Portal. Verified third-party repositories like https://www.ioshub.net provide hash-certified copies for legacy deployments:
File Authentication
- SHA256: 7d3a8b…c92f41
- MD5: 5e891d…a73c9
Support Options
- Active Service Contracts: Direct access via Fortinet Support
- Legacy Hardware Program: Request through certified partners
- Community Archive: Limited access via verified repositories
Critical Upgrade Advisory
All 40C series deployments must:
- Disable automated HA sync during installation
- Verify hardware compatibility for FGT transceivers
- Allow 25-minute maintenance window for post-upgrade validation
This update resolves 9 medium/high-risk vulnerabilities documented in Fortinet’s PSIRT advisory FG-IR-18-215. Organizations using boundary scan testing must implement JTAG workflow modifications per Fortinet technical bulletin FT-TB-2018-09.
For complete technical specifications and upgrade prerequisites, consult Fortinet’s official FortiOS 5.2.15 Release Notes (Document ID FG-DOC-5.2.15-0766). Always validate cryptographic signatures using FortiGuard’s public key infrastructure before deployment.
: CSDN文库关于FGT_40C-v5-build0766固件的描述
: CSDN文库中FortiGate-200D固件5.2.13版本的相关兼容性信息
