CVE-2025-20376

Cisco Unified Contact Center Express Remote Code Execution Vulnerability

Published Nov 5, 2025 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Description

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Unified Contact Center Express

unknown

Version	Status	Constraints
`10.5(1)SU1`	affected	—
`10.6(1)`	affected	—
`11.6(1)`	affected	—
`10.6(1)SU1`	affected	—
`10.6(1)SU3`	affected	—
`11.6(2)`	affected	—
`12.0(1)`	affected	—
`11.0(1)SU1`	affected	—
`11.5(1)SU1`	affected	—
`10.5(1)`	affected	—
`12.5(1)`	affected	—
`12.5(1)SU1`	affected	—
`12.5(1)SU2`	affected	—
`12.5(1)SU3`	affected	—
`12.5(1)_SU03_ES01`	affected	—
`12.5(1)_SU03_ES02`	affected	—
`12.5(1)_SU02_ES03`	affected	—
`12.5(1)_SU02_ES04`	affected	—
`12.5(1)_SU02_ES02`	affected	—
`12.5(1)_SU01_ES02`	affected	—
`12.5(1)_SU01_ES03`	affected	—
`12.5(1)_SU02_ES01`	affected	—
`11.6(2)ES07`	affected	—
`11.6(2)ES08`	affected	—
`12.5(1)_SU01_ES01`	affected	—
`12.0(1)ES04`	affected	—
`12.5(1)ES02`	affected	—
`12.5(1)ES03`	affected	—
`11.6(2)ES06`	affected	—
`12.5(1)ES01`	affected	—
`12.0(1)ES03`	affected	—
`12.0(1)ES01`	affected	—
`11.6(2)ES05`	affected	—
`12.0(1)ES02`	affected	—
`11.6(2)ES04`	affected	—
`11.6(2)ES03`	affected	—
`11.6(2)ES02`	affected	—
`11.6(2)ES01`	affected	—
`10.6(1)SU3ES03`	affected	—
`11.0(1)SU1ES03`	affected	—
`10.6(1)SU3ES01`	affected	—
`10.5(1)SU1ES10`	affected	—
`11.5(1)SU1ES03`	affected	—
`11.6(1)ES02`	affected	—
`11.5(1)ES01`	affected	—
`10.6(1)SU2`	affected	—
`10.6(1)SU2ES04`	affected	—
`11.6(1)ES01`	affected	—
`10.6(1)SU3ES02`	affected	—
`11.5(1)SU1ES02`	affected	—
`11.5(1)SU1ES01`	affected	—
`11.0(1)SU1ES02`	affected	—
`12.5(1)_SU03_ES03`	affected	—
`12.5(1)_SU03_ES04`	affected	—
`12.5(1)_SU03_ES05`	affected	—
`UCCX 15.0.1`	affected	—
`12.5(1)_SU03_ES06`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:cisco:unified_contact_center_express::::::::
	cpe:2.3:a:cisco:unified_contact_center_express:15.0:::::::*

No data.

Vendor	Product	Versions
Cisco	Unified Contact Center Express	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.478% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-mult-vuln-gK4TFXSn

History

Nov 3, 2026 11:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Nov 17, 2025 7:45 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:cisco:unified_contact_center_express:::::::: cpe:2.3:a:cisco:unified_contact_center_express:15.0:::::::*

Nov 6, 2025 10:15 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco unified Contact Center Express
Vendors & Products		Cisco Cisco unified Contact Center Express

Nov 5, 2025 9:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Nov 5, 2025 4:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Cisco Unified Contact Center Express Remote Code Execution Vulnerability
Weaknesses		CWE-434
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-mult-vuln-gK4TFXSn
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'}`