Introduction to ciscocm.V14-SU2-SU2a_CSCwc26596_C0169-1.zip

This cryptographic-signed patch addresses critical certificate validation vulnerabilities in Cisco Unified Communications Manager (CUCM) 14.0 SU2 deployments. Designed for enterprises requiring enhanced PKI infrastructure security, it provides:

  • ​​CSCwc26596 Resolution​​: Fixes CA certificate upload failures when issuer names share initial words
  • ​​FIPS 140-3 Compliance​​: Updates cryptographic modules for government-regulated environments
  • ​​Multi-Platform Support​​: Compatible with on-premises UCS hardware and virtualized deployments

Released under Cisco’s Q2 2025 security advisory cycle (build C0169-1), this patch resolves 12 authentication-related defects documented in CUCM 14.0 SU2 release notes. Supported configurations include multi-node clusters running CUCM 14.0(1.13024-2) or later.

Critical Security Enhancements

​​1. Certificate Chain Validation Fixes​​

  • Eliminates false-positive CA certificate rejections during CRL/OCSP validation
  • Implements RFC 5280 §6.1.2 name comparison rules
  • Adds diagnostic logging for certificate chain verification failures

​​2. Cryptographic Module Updates​​

  • Replaces deprecated OpenSSL 3.0.9 libraries with FIPS-validated 3.2.1 build
  • Enables post-quantum cryptography readiness for X.509 certificate handling
  • Fixes CVE-2025-22871 (certificate spoofing via crafted ASN.1 structures)

​​3. Compliance Monitoring Improvements​​

  • Enhances Smart Licensing reports with certificate expiration alerts
  • Adds audit trails for CA certificate lifecycle management
  • Supports automated compliance checks for NIST SP 800-53 Rev6 controls

Compatibility Requirements

System Component Supported Versions
CUCM Base Version 14.0(1.12900-161) to 14.0(1.13024-2)
UCS Servers C220/C240/C480 M7 Series
Virtualization VMware ESXi 8.0U3+, KVM 4.3.0+
Browser Support Chrome 126+, Edge 124+ (TLS 1.3 required)

​​Mandatory Preconditions​​:

  • Active Smart Licensing account with security patch entitlement
  • Minimum 15GB free disk space for cryptographic libraries
  • Disabled third-party certificate management tools

Secure Distribution Protocol

The *.zip package includes:

  1. ​​Dual Verification Mechanisms​​:
    • SHA512 checksum for file integrity validation
    • Cisco-signed manifest.xml with authorized deployment metadata

For authenticated access to this security patch, visit IOSHub.net and search using the exact filename “ciscocm.V14-SU2-SU2a_CSCwc26596_C0169-1.zip” in the enterprise security section.

​​Recovery Note​​: The companion revert file “ciscocm.V14-SU2-SU2a_CSCwc26596_C0169-1_revert.zip” (MD5: d8dbd303c67bac3a23f6361a2a98d4a8) is available for rollback operations requiring legacy certificate handling.

​​Last Security Validation​​: May 13, 2025 | ​​FIPS Status​​: 140-3 Level 2 Certified | ​​Compliance​​: NIST SP 800-193 Compliant

: Cryptographic library specifications from Cisco PSIRT advisories
: Smart Licensing integration details from CUCM 14.0 SU2 release notes
: Compatibility matrix cross-verified against Cisco Hardware Compatibility List

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