Vulnerability in Cisco Unified Communications Manager
CVE-2025-20309
A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to log in to an affected device using the root account, which has default, static credentials that cannot be changed or deleted. This vulnerability is due to the presence of static user credentials for the root account that are reserved for use during development. An attacker could exploit this vulnerability by using the account to log in to an affected system. A successful exploit could allow the attacker to log in to the affected system and execute arbitrary commands as the root user.
EPSS: 0.011 (63.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Cisco Unified Communications Manager — versions 15.0.1.13010-1, 15.0.1.13011-1, 15.0.1.13012-1
- Cisco Unified_communications_manager — versions 15.0.1.13010-1, 15.0.1.13011-1, 15.0.1.13012-1
Weakness classification (CWE)
References
- psirt@cisco.com (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20309?
- CVE-2025-20309 is a critical-severity vulnerability in Cisco Unified Communications Manager, classified under Use of Hard-coded Credentials. CVSS score: 10.0/10. Published 2025-07-02.
- How severe is CVE-2025-20309?
- Critical severity. CVSS v3 base score is 10.0 out of 10.