Arbitrary file upload in Cisco Unified Contact Center Express
CVE-2025-20354
A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is due to improper authentication mechanisms that are associated to specific Cisco Unified CCX features. An attacker could exploit this vulnerability by uploading a crafted file to an affected system through the Java RMI process. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root.
Vulnerability class: Unrestricted File Upload
EPSS: 0.009 (56.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Unified Contact Center Express — versions 10.5(1)SU1, 10.6(1), 11.6(1)
- Cisco Unified_contact_center_express — versions 15.0
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-20354?
- CVE-2025-20354 is a critical-severity vulnerability in Cisco Unified Contact Center Express, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-11-05.
- How severe is CVE-2025-20354?
- Critical severity. CVSS v3 base score is 9.8 out of 10.