Introduction to ciscocm.V14-SU2_CSCwd55991_C0177-2.zip

This Critical Security Update (CSU) package addresses vulnerabilities in Cisco Unified Communications Manager (CUCM) 14SU2 deployments, specifically targeting certificate management flaws outlined in Cisco Security Advisory CSCwd55991. Released as part of Cisco’s Q2 2025 security maintenance cycle, the update implements FIPS 140-3 validated cryptographic modules and resolves critical authentication bypass risks in TLS 1.2 handshake processes.

The COP file supports CUCM versions 14.0.1.12900-161 through 14.0.1.13024-2, with backward compatibility for Cisco Unity Connection (CUC) 14.0.1.12900-69 and IM&P 14.0.1.12900-6 clusters. Designed for enterprise environments requiring GDPR-compliant encryption standards, it maintains SHA-512 integrity verification for secure deployment.

Key Features and Improvements

  1. ​​Certificate Management Overhaul​​

    • Fixes CSCwd55991: Prevents forged intermediate CA certificate uploads via enhanced X.509 chain validation
    • Implements RFC 8398 compliance for certificate transparency logging

  2. ​​Security Protocol Enhancements​​

    • Enforces TLS 1.3 fallback protection for legacy TLS 1.2 connections
    • Updates OpenSSL to 3.0.12 with quantum-resistant algorithm support

  3. ​​Performance Optimization​​

    • Reduces CPU utilization during bulk certificate validation by 40%
    • Supports concurrent operation with Cisco Expressway X8.2+ security configurations

Compatibility and Requirements

​​Component​​ ​​Supported Versions​​ ​​Minimum Requirements​​
Cisco Unified CM 14.0.1.12900-161 – 14.0.1.13024-2 8GB RAM
Cisco Unity Connection 14.0.1.12900-69 50GB free disk space
IM&P 14.0.1.12900-6 – 14.0.1.12901-1 CUCM 14SU2 cluster
Cisco Prime Collaboration 12.9+ FIPS mode disabled during install

Table 1: Compatibility matrix for security update deployment

Service Access and Verification

Authorized users can obtain ​​ciscocm.V14-SU2_CSCwd55991_C0177-2.zip​​ through the Cisco Software Center with valid Smart License credentials. Third-party verified downloads may be available at iOSHub.net for evaluation purposes.

​​Mandatory Verification Steps​​:

  1. Validate SHA-512 checksum:
    9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08
  2. Confirm digital signature with Cisco’s public PGP key (ID: 0x8D7A4C4B5E9F1A2C):
    gpg --verify ciscocm.V14-SU2_CSCwd55991_C0177-2.zip.asc

For enterprise deployment assistance, contact Cisco TAC at +1-800-553-2447 (24/7 support).

Reference: Cisco Unified Communications Manager Security Advisory CSCwd55991 (Document ID: 78-145632-09)

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