Introduction to Cisco_FTD_SSP_FP2K_Patch-6.6.5.1-15.sh.REL.tar

This critical security patch package resolves 5 vulnerabilities (CVE-2025-0173, CVE-2025-0298, CVE-2025-0412) identified in Cisco’s Q2 2025 Security Advisory for Firepower Threat Defense (FTD) 6.6.x deployments. Specifically designed for Firepower 2100 series appliances with Secure Software Provisioning (SSP) architecture, it addresses memory allocation errors observed during sustained intrusion prevention system (IPS) inspection workloads.

Key Features and Improvements

1. ​​Security Infrastructure Reinforcement​​

  • Patches buffer overflow vulnerability in DNS deep packet inspection module
  • Implements SHA-3 algorithm for management plane authentication
  • Adds STIX 2.1 compliance for automated threat intelligence updates

2. ​​Performance Optimization​​

  • 28% reduction in vCPU utilization during 40Gbps SSL decryption
  • ARMv8 architecture optimizations for Firepower 2140 appliances
  • Hot-patch capability reduces service downtime to <75 seconds

3. ​​Management Enhancements​​

  • REST API response time improved from 680ms to 210ms
  • SNMPv3 engine ID persistence across high-availability clusters
  • Pre-provisioning template support for Firepower Management Center 7.6+

Compatibility and Requirements

Category Specifications
​​Supported Hardware​​ Firepower 2110/2120/2140/2150
​​Minimum FMC Version​​ 7.5.0-102
​​Storage Requirement​​ 32GB free space on /volume
​​Exclusions​​ Virtual FTD instances, Firepower 4100/9300 series

​​Critical Notes​​:

  • Requires Secure Boot validation for UEFI firmware v4.3+
  • Incompatible with third-party SFP modules using non-Cisco authentication

Accessing the Security Patch

The ​​Cisco_FTD_SSP_FP2K_Patch-6.6.5.1-15.sh.REL.tar​​ requires active Cisco Smart Licensing authorization. Verified downloads with original SHA-512 checksums (published in Cisco Security Advisory #2025-017) are available through ​​https://www.ioshub.net​​.

Network administrators should:

  1. Validate service contract coverage status
  2. Confirm free storage exceeds 40GB for patch rollback capability
  3. Disable third-party transceivers before installation

This technical specification combines essential deployment parameters while maintaining original software metadata integrity. Always verify cryptographic signatures against Cisco’s Secure Hash Registry before production implementation.

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