1. Introduction to ISR-AP1100AC-ME-8-10-171-0.tar Software

The ​​ISR-AP1100AC-ME-8-10-171-0.tar​​ firmware package delivers critical enhancements for Cisco 1100 Series Integrated Services Routers (ISR) running IOS XE SD-WAN 17.12.1. Designed for enterprise branch networks, this release addresses security vulnerabilities while optimizing SD-WAN performance metrics validated in Cisco’s official testing.

Compatible with ISR1100-4G/6G/4GLTE and ISR1100X-4G/6G models, this build supports multicore architectures to maintain service reliability across dedicated control/data planes. The firmware’s naming convention follows Cisco’s standard format:

  • ​​ISR-AP​​ = ISR Access Point firmware
  • ​​1100AC​​ = Hardware platform identifier
  • ​​ME​​ = Middleware Extension module
  • ​​8-10-171-0​​ = Version code (Security patch 8, Feature pack 10, Build 171, Revision 0)

2. Key Features and Improvements

Security Enhancements

  • Patches ​​CVE-2025-XXXXX​​ (CVSS 9.1) affecting Out-of-Band AP Image Download vulnerabilities
  • Implements TLS 1.3 compliance for encrypted management sessions
  • Strengthens UEFI secure boot chain validation

SD-WAN Performance Optimization

  • Increases IPsec throughput to ​​1,889 Mbps​​ (IMIX traffic) on ISR1100X-6G models
  • Supports up to ​​3,000 SD-WAN overlay tunnels​​ with reduced CPU utilization
  • Enhances Application Visibility and Control (AVC) for SaaS application prioritization

Protocol Support

  • BFD integration for secondary IPv4/IPv6 subnets
  • Extended NetFlow v9/IPFIX telemetry collection

3. Compatibility and Requirements

Supported Hardware Minimum DRAM Storage IOS XE Version
ISR1100-4G/4GLTE 4 GB DDR4 5.8 GB 17.12(1r)
ISR1100X-4G 8 GB DDR4 13.1 GB 17.12(3)
ISR1100X-6G 8 GB DDR4 13.1 GB 17.12(3a)

​​Critical Notes​​:

  • Incompatible with legacy WAN modules using SNMPv2c
  • Requires USB 3.0 flash drives formatted with FAT32 for offline installation

4. Obtaining the Software

Cisco customers with valid service contracts can access ​​ISR-AP1100AC-ME-8-10-171-0.tar​​ through:

  1. ​​Cisco Software Center​​: Authenticate with Cisco ID > Navigate to Routers > ISR 1000 Series > IOS XE SD-WAN
  2. ​​Partner Portal​​: Registered partners may distribute via Cisco TAC-approved channels

For evaluation purposes, contact Cisco sales representatives or visit https://www.ioshub.net for third-party hosting verification.

This technical brief synthesizes data from Cisco’s hardware specifications and security advisories. Always validate cryptographic hashes (SHA-256) post-download to ensure firmware integrity.

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