CVE-2025-20358

Cisco Unified Contact Center Express Editor Authentication Bypass Vulnerability

Published Nov 5, 2025 CVSS 3.1 · 9.4 Critical EPSS < 1% KEV · Not listed

Description

A vulnerability in the Contact Center Express (CCX) Editor application of Cisco Unified CCX could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative permissions pertaining to script creation and execution.

This vulnerability is due to improper authentication mechanisms in the communication between the CCX Editor and an affected Unified CCX server. An attacker could exploit this vulnerability by redirecting the authentication flow to a malicious server and tricking the CCX Editor into believing the authentication was successful. A successful exploit could allow the attacker to create and execute arbitrary scripts on the underlying operating system of an affected Unified CCX server, as an internal non-root user account.

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 None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.923% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-unauth-rce-QeN8h7mQ

History

Feb 27, 2026 3:15 PM Scoring metrics updated View changes

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

Nov 7, 2025 3:45 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 8:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, '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 Contact Center Express (CCX) Editor application of Cisco Unified CCX could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative permissions pertaining to script creation and execution. This vulnerability is due to improper authentication mechanisms in the communication between the CCX Editor and an affected Unified CCX server. An attacker could exploit this vulnerability by redirecting the authentication flow to a malicious server and tricking the CCX Editor into believing the authentication was successful. A successful exploit could allow the attacker to create and execute arbitrary scripts on the underlying operating system of an affected Unified CCX server, as an internal non-root user account.
Title		Cisco Unified Contact Center Express Editor Authentication Bypass Vulnerability
Weaknesses		CWE-306
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-unauth-rce-QeN8h7mQ
Metrics		cvssV3_1 `{'score': 9.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'}`