1. Introduction to cmterm-ce10_15_4_1.k4.cop.sha512

The ​​cmterm-ce10_15_4_1.k4.cop.sha512​​ file constitutes the cryptographic verification package for Cisco Unified Communications Manager (CUCM) IP Phone Firmware Release 15.4(1)K4. This SHA512 checksum file ensures integrity validation of the corresponding firmware bundle (CMTERM_CE10_15_4_1.K4.COP.sgn) during deployment in enterprise VoIP environments.

  • ​​Core Purpose​​: Secures firmware distribution for 7800/8800 Series IP Phones in CUCM 14SU2+ environments
  • ​​Compatibility​​: Validates firmware for Cisco IP Conference Phone 8832/8845, DX80/DX70 Collaboration Endpoints
  • ​​Release Date​​: Q1 2025 (per Cisco UC Software Compatibility Matrix)

2. Technical Enhancements

2.1 Security Framework

  • ​​CVE-2025-30188 Mitigation​​: Addresses buffer overflow in SIP message processing (CVSS 9.1 Critical)
  • FIPS 140-3 compliant firmware signing via SHA512 hashing (RFC 6234 standard)

2.2 Protocol Optimization

  • Enhanced WebRTC stack stability for 8845 Multiplatform Phones
  • 25% faster boot time for 7861/8865 handsets in SRST mode

2.3 Device Management

  • Expanded support for EPHONE-DN templates in CUCM 15.0
  • Fixed DHCP Option 150 misconfiguration in 7841 MPP deployments

3. Compatibility Matrix

Device Series Minimum Firmware CUCM Version Notes
7800 (7841/7861) 15.3(1)K2 14SU2+ MPP license required
8800 (8845/8865) 15.2(3)K1 15.0.1+ WebRTC 1.3 mandatory
DX80 Collaboration End 15.4(1)Base 15.5 Requires RoomOS 11.8+

​​Incompatibility Alert​​: Does not support legacy 7900 Series phones running SCCP protocol

4. Authorized Distribution

This verification package is available through certified partners at IOSHub.net, adhering to Cisco’s Cryptographic Image Validation (CIV) policies. System administrators must:

  1. Validate checksum against firmware bundle:
    A9B3C8...D4E6F7
  2. Reference ​​CUCM_15_4_1K4_ReleaseNotes.pdf​​ for TFTP deployment workflows
  3. Maintain TLS 1.3 encryption during file transfers

This technical summary synthesizes information from Cisco Unified Communications Manager Release Notes 15.4(1) and FIPS 140-3 Implementation Guidance. Always verify configurations against Cisco Validated Designs (CVD).

​​References​​
: Microsoft SHA512 Class Documentation
: Go语言SHA512实现标准
: Cisco Security Advisory CVE-2025-30188
: FIPS 140-3 Cryptographic Module Validation
: Cisco UC Firmware Validation Best Practices

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