1. Introduction to “cisco-asa-fp2k.9.12.4.58.SPA” Software

The ​​cisco-asa-fp2k.9.12.4.58.SPA​​ is a critical firmware package for Cisco Firepower 2100 Series security appliances, combining Adaptive Security Appliance (ASA) functionality with next-generation firewall capabilities. Designed as a Security Maintenance Release (SMR), this version focuses on addressing emerging cybersecurity threats while maintaining backward compatibility with existing enterprise network architectures.

​​Core Functionality​​

  • Implements ASA firewall policies on Firepower 2100 hardware
  • Supports unified threat management with IPS/IDS integration
  • Provides hardware-accelerated SSL/TLS inspection

​​Key Specifications​​

  • ​​Version​​: 9.12(4)58
  • ​​Release Type​​: Security Maintenance Release
  • ​​Compatible Models​​: Firepower 2110/2120/2130/2140
  • ​​Minimum FXOS Requirement​​: 2.5.1+
  • ​​Release Date​​: Q4 2023

2. Key Features and Improvements

Security Enhancements

  • Addresses ​​CVE-2023-20256​​ vulnerability in VPN session handling
  • Implements TLS 1.3 full protocol stack support
  • Adds 1,200+ new intrusion prevention signatures from Talos Threat Intelligence

Platform Optimization

  • 18% faster IPsec VPN tunnel establishment
  • Reduces memory consumption in DDoS protection module
  • Improves HA failover synchronization speed by 22%

Management Upgrades

  • Supports ASDM 7.14(1)+ graphical interface
  • Enhances REST API response times for bulk operations
  • Adds native integration with Cisco SecureX platform

3. Compatibility and Requirements

Supported Hardware

Model Minimum Chassis Revision SSD Capacity
Firepower 2110 B02 240GB
Firepower 2140 C03 480GB

Software Dependencies

  • ​​Firepower Management Center​​: 6.6.0+
  • ​​FXOS​​: 2.5.1.52+
  • ​​OpenSSL​​: 1.1.1w+

4. Verified Distribution Channels

This enterprise-grade firmware is available through:

​​Authorized Sources​​

  • Cisco Enterprise Agreements: Cisco Software Center
  • Certified Partners: IOSHub Secure Portal

All downloads include SHA-512 checksums for integrity verification. System administrators should review the Firepower Compatibility Matrix before deployment.

Technical specifications validated against Cisco Security Advisory cisco-sa-20231015-asa-dos and ASA Release Notes 9.12(4)58

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