: The AXL API, while powerful for automation, has its own vulnerabilities. CVE-2023-20116 is a denial-of-service (DoS) vulnerability in the AXL API of CUCM that can be triggered by sending crafted HTTP input. Although DoS is less severe than RCE, it can still disrupt business-critical voice communications.
Multiple vulnerabilities allow attackers to execute code on the underlying OS.
: Exploits like those found in RouterSploit target path traversal vulnerabilities to read system files or execute arbitrary commands. Critical Vulnerabilities
Used by IP phones to download firmware and configuration files (Port 69). These configuration files often contain sensitive information in plain text or weakly encrypted formats. 2. Common CUCM Vulnerability Categories Cisco CUCM hacking -- GitHub
While not strictly hacking, attackers use tools to parse CUCM’s CDR logs (stored in a SQL database) to map out organizational hierarchies.
Security research on GitHub details vulnerabilities in Cisco Unified Communications Manager (CUCM), including Remote Code Execution (CVE-2024-20253) and insecure TFTP configurations. Securing the environment requires monitoring official Cisco advisories, applying patches, and implementing hardening guides to restrict access. You can find related technical discussions and resources on GitHub.
Forward CUCM Syslog data to a SIEM system. Watch for anomalous authentication failures on port 8443 or sudden spikes in directory queries. : The AXL API, while powerful for automation,
A critical vulnerability in the data processing component of multiple Cisco Unified Communications products that allows an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system.
A major critical vulnerability (CVE-2025-20278) involved static SSH credentials for the root account, allowing unauthenticated remote attackers to gain full system control.
Disclaimer: This article is for educational and defensive purposes only. Unauthorized access to computer systems is illegal. Always obtain proper authorization before conducting any security testing. Multiple vulnerabilities allow attackers to execute code on
Disable services like SmartLicenseMgr or unnecessary HTTP services to reduce the attack surface.
PoC code for exploiting authentication bypass, remote code execution (RCE), or SQL injection. 2. Common Cisco CUCM Attack Vectors
: Certain tools facilitate privilege escalation, allowing users to gain elevated access to the system.
Forward CUCM syslog data to a Security Information and Event Management (SIEM) system. Monitor for anomalous administrative logins, repetitive failed API requests (AXL), or mass TFTP configuration requests from non-phone IP addresses.