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Introduction to isr4400-universalk9.16.03.01.SPA.bin The ​​isr4400-universalk9.16.03.01.SPA.bin​​ is the official IOS XE software image for Cisco 4000 Series Integrated Services Routers, delivering enterprise-level routing, security, and SD-WAN functionalities. Released under Cisco’s Extended Maintenance Release (EMR) program in Q3 2023, this version provides...

Introduction to isr4400-universalk9.16.03.04.SPA.bin This consolidated software package delivers Cisco IOS XE Gibraltar 16.3.4 functionality for ISR4400 series routers, addressing critical vulnerabilities identified in CVE-2023-20109 (CVSS 8.1) related to HTTP/2 protocol stack resource management. Designed for enterprise branch network deployments, it...

​​Introduction to isr4400-universalk9.03.16.04b.S.155-3.S4b-ext.SPA.bin Software​​ The ​​isr4400-universalk9.03.16.04b.S.155-3.S4b-ext.SPA.bin​​ firmware represents Cisco’s specialized maintenance release for the ISR 4400 Series routers under the IOS XE 03.16.x software branch. Designed for enterprise edge networks requiring extended security compliance and SD-WAN interoperability, this build consolidates...

1. Introduction to isr4400-universalk9.03.16.06.S.155-3.S6-ext.SPA.bin Software This consolidated software package delivers critical security and performance updates for Cisco 4400 Series Integrated Services Routers (ISR4400), specifically designed for enterprises requiring extended maintenance support. As part of the Everest 16.6 software train, this...

Introduction to isr4400-universalk9.03.14.01.S.155-1.S1-std.SPA.bin Software The ​​isr4400-universalk9.03.14.01.S.155-1.S1-std.SPA.bin​​ firmware serves as a critical maintenance release for Cisco ISR 4400 Series Integrated Services Routers, designed to address operational stability and security vulnerabilities in enterprise branch networks. This software belongs to the IOS XE...

Introduction to isr4400-universalk9.03.15.02.S.155-2.S2-std.SPA.bin Software The ​​isr4400-universalk9.03.15.02.S.155-2.S2-std.SPA.bin​​ firmware package delivers essential updates for Cisco ISR 4461 routers running Cisco IOS® XE Bengaluru 03.15.x. Released on January 15, 2025, this maintenance build addresses critical security vulnerabilities while maintaining backward compatibility with legacy...

​​Introduction to “isr4400-universalk9.03.13.07.S.154-3.S7-ext.SPA.bin” Software​​ The ​​isr4400-universalk9.03.13.07.S.154-3.S7-ext.SPA.bin​​ firmware is a specialized maintenance release for Cisco ISR 4400 Series Integrated Services Routers, targeting critical security updates and performance optimizations for enterprise-grade networks. As part of Cisco’s IOS XE 3.13.x software train, this...

Introduction to isr4400-universalk9.03.13.03.S.154-3.S3-ext.SPA.bin Software This Extended Service Package (S3-ext.SPA) delivers Cisco IOS XE Fuji 03.13.03 for ISR 4400 series routers, specifically engineered for mission-critical branch networks requiring extended security maintenance. The firmware combines routing, SD-WAN, and advanced threat protection capabilities...

1. Introduction to isr4400-universalk9.03.11.00.S.154-1.S-std.SPA.bin Software This firmware package delivers essential security updates and performance enhancements for Cisco ISR 4400 Series Integrated Services Routers, specifically designed for enterprise branch networks requiring stable routing and threat defense capabilities. As part of the...

Introduction to isr4400-universalk9.03.13.02.S.154-3.S2-ext.SPA.bin The ​​isr4400-universalk9.03.13.02.S.154-3.S2-ext.SPA.bin​​ software package delivers Cisco IOS XE Fuji 3.13.2 Extended Support Release (ESR) for 4000 Series Integrated Services Routers. Designed for mission-critical enterprise networks, this version provides long-term stability with backported security fixes and hardware compatibility...