---
id: CVE-2025-20376
title: Cisco Unified Contact Center Express Remote Code Execution Vulnerability
summary: "A vulnerability in the web UI of Cisco Unified CCX could allow an authenticated, remote attacker to upload and execute arbitrary files.\r\n\r\nThis vulnerability is due to an insufficient input validation associated to file upload mechanisms…"
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'
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: 'no'
  technicalImpact: total
  timestamp: '2025-11-06T04:55:45.488528Z'
published: '2025-11-05'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:02:53.535Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-20376'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-mult-vuln-gK4TFXSn
    label: cisco-sa-cc-mult-vuln-gK4TFXSn
tags:
  - cve.org
epss: 0.00478
epssPercentile: 0.41388
ingestedAt: '2026-11-05T20:33:06.537Z'
---

## Overview

A vulnerability in the web UI of Cisco Unified CCX could allow an authenticated, remote attacker to upload and execute arbitrary files.

This vulnerability is due to an insufficient input validation associated to file upload mechanisms. An attacker could exploit this vulnerability by uploading a malicious file to the web UI and executing it. A successful exploit could allow the attacker to execute arbitrary commands on the underlying system and elevate privileges to root. To exploit this vulnerability, the attacker must have valid administrative credentials.

## 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.