The Gist and its associated comments outline several specific techniques for modifying CUCM behavior: Extending Demo Licenses:
: Similar to SeeYouCM-Thief, this script extracts credentials from configuration files and can even attempt to verify if leaked credentials are valid against Active Directory (AD). unified_multi_path_traversal.py
to increase Device License Units (DLUs), though users report these files are absent in newer versions. Banner Removal: Cisco CUCM hacking -- GitHub
: Several public tools demonstrate how an attacker can inventory all phones on a network. The cucm-phonegrabber tool, for instance, retrieves a list of registered phones from a CUCM server, then connects to each phone's web interface to parse its serial number. The script can process 1,000 phones in just 15–30 seconds. Similarly, the official Cisco-authored script cisco_cucm_phone_inventory_with_serial uses the AXL API to build a detailed CSV inventory of devices, including MAC addresses, serial numbers, and extensions.
Cisco Unified Communications Manager (CUCM) is the brain of many enterprise voice and video networks. It handles call routing, phone provisioning, user directories, and countless other critical tasks. However, where there is complexity, there are vulnerabilities. For security researchers and penetration testers, CUCM has become a rewarding target, and GitHub has emerged as a central repository for the tools and exploits used to break into these systems. This article provides a deep dive into the offensive cybersecurity landscape surrounding Cisco CUCM, focusing on the most dangerous tools, notable vulnerabilities, and the defensive measures needed to secure your environment. The Gist and its associated comments outline several
GitHub hosts a variety of open-source tools designed for security assessment (and, unfortunately, malicious exploitation) of Cisco CUCM. Here are some of the most noteworthy.
SeeYouCM-Thief is a credential-finding tool specifically built to discover and parse CUCM server configuration files for SSH credentials. With over 180 stars on GitHub, it has gained significant adoption in the penetration testing community. The tool’s effectiveness, coupled with its focus on CUCM-specific artifacts, underscores how accessible—and dangerous—credential harvesting can be once an attacker gains a foothold. The cucm-phonegrabber tool, for instance, retrieves a list
By working together, we can reduce the risks associated with Cisco CUCM hacking and protect our organizations from the threats posed by hackers.
Public repositories host custom NSE scripts tailored to fingerprint Cisco Unified Communications software by querying specific ports like 24830 (Cisco TCU) and 5060/5061 (SIP). 2. Exploiting Known Vulnerabilities (CVEs)
Cisco CUCM is a comprehensive IP telephony solution that enables businesses to manage their voice and video communications. It provides a range of features, including call processing, unified messaging, and conferencing. CUCM is widely used in enterprise environments, supporting thousands of users and multiple locations.