Cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin | CERTIFIED - OVERVIEW |

This image uses OpenSSL 0.9.8 (end-of-life since 2015). Modern exploits like Heartbleed (CVE-2014-0160) are not present (that affected 1.0.1), but other TLS/crypto flaws are likely.

Expert Verdict: If this image is running in production, you are likely compliant with no security mandates (PCI-DSS, HIPAA, NIST) without mitigations (ACLs, management plane protection).

Not recommended for new deployments.
Use only for legacy 3650/3850 environments that cannot upgrade to IOS XE 16.6+ due to hardware constraints.
Security risk: No patches for PSIRTs after September 2019. If exposed to management network, isolate VLAN or upgrade to 16.12.10 or later. cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin

Before downloading cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin, confirm your hardware and existing environment.

  • Bootloader requirement: ROMmon version 15.2(2r) or newer.
  • Memory: Minimum 4GB DRAM (standard on all C3K).

    • The filename cat3k-caa-universalk9.spa.03.06.10.e.152-2.e10.bin encapsulates a specific moment in networking history: the transition from classic IOS to modular, Linux-based architectures. It is a mature, battle-hardened firmware release that brings security patches, stacking reliability, and hardware encryption to the Catalyst 3750-X and 3560-X families. This image uses OpenSSL 0

    However, with Cisco’s EoL declaration, network administrators must view this image as a maintenance-only release. Use it to extend the life of existing hardware, but plan a migration to Catalyst 9300 or 9200 series running IOS-XE 17.x for future security and feature support.

    Final Recommendation: If you are deploying this image today, ensure it is air-gapped or heavily firewalled, monitor the switch’s CPU for anomalies, and have a rollback plan. The era of cat3k-caa is sunsetting – but for the remaining deployments, this firmware remains a testament to Cisco’s engineering maturity. Not recommended for new deployments

  • Final release for 3750-X/3560-X:

    • Known quirky behaviors in this exact sub-version:

    | Attribute | Detail | | :--- | :--- | | Full IOS-XE Release | 3.6.10E | | Corresponding IOS Release | 15.2(2)E10 | | Release Date | ~December 2015 (approximate) | | Image Size | ~220–240 MB | | Architecture | ARMv7 (Cisco's “CAA” – Cisco Application Architecture) | | File System | Linux + IOS process | | Licensing | Universal image (Right-to-Use, eval, or permanent licenses for IP Services) |