---
id: CVE-2025-20354
title: Cisco Unified Contact Center Express Remote Code Execution Vulnerability
summary: >-
  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.…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-434
vendor: Cisco
product: Cisco Unified Contact Center Express
affected:
  - unified_contact_center_express 10.5(1)SU1
  - unified_contact_center_express 10.6(1)
  - unified_contact_center_express 11.6(1)
  - unified_contact_center_express 10.6(1)SU1
  - unified_contact_center_express 10.6(1)SU3
  - unified_contact_center_express 11.6(2)
  - unified_contact_center_express 12.0(1)
  - unified_contact_center_express 11.0(1)SU1
  - unified_contact_center_express 11.5(1)SU1
  - unified_contact_center_express 10.5(1)
  - unified_contact_center_express 12.5(1)
  - unified_contact_center_express 12.5(1)SU1
  - unified_contact_center_express 12.5(1)SU2
  - unified_contact_center_express 12.5(1)SU3
  - unified_contact_center_express 12.5(1)_SU03_ES01
  - unified_contact_center_express 12.5(1)_SU03_ES02
  - unified_contact_center_express 12.5(1)_SU02_ES03
  - unified_contact_center_express 12.5(1)_SU02_ES04
  - unified_contact_center_express 12.5(1)_SU02_ES02
  - unified_contact_center_express 12.5(1)_SU01_ES02
  - unified_contact_center_express 12.5(1)_SU01_ES03
  - unified_contact_center_express 12.5(1)_SU02_ES01
  - unified_contact_center_express 11.6(2)ES07
  - unified_contact_center_express 11.6(2)ES08
  - unified_contact_center_express 12.5(1)_SU01_ES01
  - unified_contact_center_express 12.0(1)ES04
  - unified_contact_center_express 12.5(1)ES02
  - unified_contact_center_express 12.5(1)ES03
  - unified_contact_center_express 11.6(2)ES06
  - unified_contact_center_express 12.5(1)ES01
  - unified_contact_center_express 12.0(1)ES03
  - unified_contact_center_express 12.0(1)ES01
  - unified_contact_center_express 11.6(2)ES05
  - unified_contact_center_express 12.0(1)ES02
  - unified_contact_center_express 11.6(2)ES04
  - unified_contact_center_express 11.6(2)ES03
  - unified_contact_center_express 11.6(2)ES02
  - unified_contact_center_express 11.6(2)ES01
  - unified_contact_center_express 10.6(1)SU3ES03
  - unified_contact_center_express 11.0(1)SU1ES03
  - unified_contact_center_express 10.6(1)SU3ES01
  - unified_contact_center_express 10.5(1)SU1ES10
  - unified_contact_center_express 11.5(1)SU1ES03
  - unified_contact_center_express 11.6(1)ES02
  - unified_contact_center_express 11.5(1)ES01
  - unified_contact_center_express 10.6(1)SU2
  - unified_contact_center_express 10.6(1)SU2ES04
  - unified_contact_center_express 11.6(1)ES01
  - unified_contact_center_express 10.6(1)SU3ES02
  - unified_contact_center_express 11.5(1)SU1ES02
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-11-06T04:55:43.370246Z'
published: '2025-11-05'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:02:53.256Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-20354'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-unauth-rce-QeN8h7mQ
    label: cisco-sa-cc-unauth-rce-QeN8h7mQ
tags:
  - cve.org
epss: 0.00869
epssPercentile: 0.58907
ingestedAt: '2026-11-05T20:33:06.536Z'
---

## Overview

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.

## Affected

- `unified_contact_center_express 10.5(1)SU1`
- `unified_contact_center_express 10.6(1)`
- `unified_contact_center_express 11.6(1)`
- `unified_contact_center_express 10.6(1)SU1`
- `unified_contact_center_express 10.6(1)SU3`
- `unified_contact_center_express 11.6(2)`
- `unified_contact_center_express 12.0(1)`
- `unified_contact_center_express 11.0(1)SU1`
- `unified_contact_center_express 11.5(1)SU1`
- `unified_contact_center_express 10.5(1)`
- `unified_contact_center_express 12.5(1)`
- `unified_contact_center_express 12.5(1)SU1`
- `unified_contact_center_express 12.5(1)SU2`
- `unified_contact_center_express 12.5(1)SU3`
- `unified_contact_center_express 12.5(1)_SU03_ES01`
- `unified_contact_center_express 12.5(1)_SU03_ES02`
- `unified_contact_center_express 12.5(1)_SU02_ES03`
- `unified_contact_center_express 12.5(1)_SU02_ES04`
- `unified_contact_center_express 12.5(1)_SU02_ES02`
- `unified_contact_center_express 12.5(1)_SU01_ES02`
- `unified_contact_center_express 12.5(1)_SU01_ES03`
- `unified_contact_center_express 12.5(1)_SU02_ES01`
- `unified_contact_center_express 11.6(2)ES07`
- `unified_contact_center_express 11.6(2)ES08`
- `unified_contact_center_express 12.5(1)_SU01_ES01`
- `unified_contact_center_express 12.0(1)ES04`
- `unified_contact_center_express 12.5(1)ES02`
- `unified_contact_center_express 12.5(1)ES03`
- `unified_contact_center_express 11.6(2)ES06`
- `unified_contact_center_express 12.5(1)ES01`
- `unified_contact_center_express 12.0(1)ES03`
- `unified_contact_center_express 12.0(1)ES01`
- `unified_contact_center_express 11.6(2)ES05`
- `unified_contact_center_express 12.0(1)ES02`
- `unified_contact_center_express 11.6(2)ES04`
- `unified_contact_center_express 11.6(2)ES03`
- `unified_contact_center_express 11.6(2)ES02`
- `unified_contact_center_express 11.6(2)ES01`
- `unified_contact_center_express 10.6(1)SU3ES03`
- `unified_contact_center_express 11.0(1)SU1ES03`
- `unified_contact_center_express 10.6(1)SU3ES01`
- `unified_contact_center_express 10.5(1)SU1ES10`
- `unified_contact_center_express 11.5(1)SU1ES03`
- `unified_contact_center_express 11.6(1)ES02`
- `unified_contact_center_express 11.5(1)ES01`
- `unified_contact_center_express 10.6(1)SU2`
- `unified_contact_center_express 10.6(1)SU2ES04`
- `unified_contact_center_express 11.6(1)ES01`
- `unified_contact_center_express 10.6(1)SU3ES02`
- `unified_contact_center_express 11.5(1)SU1ES02`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.