CVE-2025-20354 Cisco Unified Contact Center Express Remote Code Execution Vulnerability

Critical 9.8 Published 5 Nov 2025 Updated 26 Feb 2026

Unauthenticated remote attackers can upload files via Java RMI to execute arbitrary commands with root privileges on Cisco Unified CCX systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20354?

CVE-2025-20354 is a critical vulnerability in Cisco Unified Contact Center Express, published on 5 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-434

Which versions are affected by CVE-2025-20354?

It affects 1 product.

Products include Cisco Unified Contact Center Express.

How do I fix CVE-2025-20354?

No fix has been published for CVE-2025-20354 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-20354 being exploited?

There is no known exploitation of CVE-2025-20354 in the wild and no public exploit code.

Sources

Also known as GHSA-px5r-4v6x-q5mv.