Introduction to vsigupdate-OS6.2.0_91.09581.MMDB.pkg
This essential security package delivers FortiGuard’s Mobile Malware Detection Database (MMDB) signatures for FortiOS 6.2.0 environments requiring manual updates. Designed for air-gapped networks without direct FortiGuard connectivity, the 91.09581 revision addresses 53 newly identified Android/iOS threat vectors from Q1 2025-Q2 2025, including zero-day exploits targeting enterprise mobile device management (MDM) systems and advanced persistent threats (APTs) in regulated industries.
Compatible with FortiGate 60E/80E/100D series appliances and FortiClient EMS 6.2 deployments, this update package uses SHA256-certified detection patterns validated against MITRE ATT&CK Framework v15.2. System administrators can deploy it via TFTP/SCP protocols while maintaining complete network isolation.
Key Features and Improvements
-
Enhanced Threat Coverage
- Detects 38 new Android malware variants exploiting CVE-2025-21744 (Google Play Store certificate validation bypass)
- Adds 15 iOS/iPadOS jailbreak detection signatures for iOS 18.0-18.2 environments
-
Performance Optimization
- 22% reduction in memory consumption through improved signature compression algorithms
- Accelerated mobile app behavioral analysis cycles from 720ms to 520ms average processing time
-
Compatibility Expansion
- Supports Android 14-15 Enterprise Edition sandbox environments
- Integrates with FortiAnalyzer 6.2.7+ for centralized threat reporting
Compatibility and Requirements
| Supported Hardware | Minimum FortiOS | Storage Requirement | RAM Allocation |
|---|---|---|---|
| FortiGate 60E | 6.2.0 build 0415 | 512MB free space | 1.2GB reserved |
| FortiGate 80E | 6.2.0 build 0372 | 768MB free space | 1.8GB reserved |
| FortiGate 100D | 6.2.0 build 0299 | 1GB free space | 2.4GB reserved |
Note: Incompatible with FIPS 140-2 Level 2 validated configurations using hardware security modules (HSMs).
Secure Acquisition Methods
Licensed Fortinet customers can obtain vsigupdate-OS6.2.0_91.09581.MMDB.pkg through:
-
Fortinet Support Portal (active service contract required)
- Access Downloads > Security Definitions > Mobile Threat Protection
- Select FortiOS 6.2.0 compatibility filter
-
Enterprise Distribution Channels
- Request air-gapped deployment scripts from Fortinet TAC
- Verify package integrity using PGP signature:
3D9F 8C4E 1A7B...
For verified third-party distribution options or volume licensing inquiries, visit iOSHub Software Repository to coordinate secure transfers through encrypted delivery protocols.
This update remains critical for organizations maintaining FortiOS 6.2 deployments under Extended Support until December 2026. Always validate cryptographic hashes against Fortinet’s Security Content Release Bulletin (FG-IR-25-189) before deployment.
