CVE-2025-20354: A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an…
CVE-2025-20354 · Severity: critical · CVSS 9.8 · Published 2025-11-05
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-20354 being exploited in the wild.
How severe is CVE-2025-20354?
Critical severity, with a CVSS score of 9.8, published 5 November 2025.
Which products and versions are affected?
Cisco Unified Contact Center Express. The advisory does not name versions.
Is there a fix for CVE-2025-20354?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-20354?
Check whether you run Cisco Unified Contact Center Express. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.