CVE-2025-20354
Cisco Unified Contact Center Express Remote Code Execution Vulnerability
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.
INFO
Published Date :
Nov. 5, 2025, 5:15 p.m.
Last Modified :
Nov. 5, 2025, 5:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Cisco Unified CCX to the latest secure version.
- Review and strengthen RMI process authentication.
- Restrict access to RMI services.
- Monitor systems for suspicious activity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-20354.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-unauth-rce-QeN8h7mQ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-20354 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-20354
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-20354 vulnerability anywhere in the article.
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Help Net Security
Cisco fixes critical UCCX flaws, patch ASAP! (CVE-2025-20358, CVE-2025-20354)
Cisco has fixed two critical vulnerabilities (CVE-2025-20358, CVE-2025-20354) affecting Unified Contact Center Express (UCCX), which may allow attackers to bypass authentication, compromise vulnerable ... Read more
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The Hacker News
Cisco Warns of New Firewall Attack Exploiting CVE-2025-20333 and CVE-2025-20362
Nov 06, 2025Ravie LakshmananZero-Day / Vulnerability Cisco on Wednesday disclosed that it became aware of a new attack variant that's designed to target devices running Cisco Secure Firewall Adaptiv ... Read more
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BleepingComputer
Critical Cisco UCCX flaw lets attackers run commands as root
Cisco has released security updates to patch a critical vulnerability in the Unified Contact Center Express (UCCX) software, which could enable attackers to execute commands with root privileges. The ... Read more
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CybersecurityNews
Cisco Unified Contact Center Express Vulnerabilities Let Remote Attacker Execute Malicious Code
Cisco has disclosed multiple critical vulnerabilities in Unified Contact Center Express (CCX) that allow unauthenticated remote attackers to execute malicious code and escalate privileges. The vulnera ... Read more
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security.nl
Cisco dicht kritiek lek dat aanvaller controle over callcenter-server geeft
Cisco heeft beveiligingsupdates uitgebracht voor een kritieke kwetsbaarheid in Unified Contact Center Express (UCCX) waardoor een ongeauthenticeerde aanvaller op afstand volledige controle over het sy ... Read more
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Daily CyberSecurity
Critical Cisco CCX RCE Flaws (CVSS 9.8) Allow Unauthenticated Root Access via Java RMI and CCX Editor
Cisco has released urgent security updates to address two critical vulnerabilities in its Unified Contact Center Express (Unified CCX) software, which could allow unauthenticated remote attackers to e ... Read more
The following table lists the changes that have been made to the
CVE-2025-20354 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Nov. 05, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-434 Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-unauth-rce-QeN8h7mQ