CVE-2026-20117

Analyzed Analyzed - Analysis Complete

Cross-Site Scripting in Cisco Unified CCX Web Interface

Publication date: 2026-03-11

Last updated on: 2026-07-08

Assigner: Cisco Systems, Inc.

Description

A vulnerability in the web-based management interface of Cisco Unified Contact Center Express (Unified CCX) could allow an unauthenticated, remote attacker to conduct cross-site scripting (XSS) attacks against a user of the interface. This vulnerability exists because the web-based management interface of an affected system does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-03-11

Last Modified

2026-07-08

Generated

2026-07-26

AI Q&A

2026-03-11

EPSS Evaluated

2026-07-25

NVD

CVE-2026-20117

EUVD

EUVD-2026-11223

Affected Vendors & Products

Vendor	Product	Version / Range
cisco	unified_contact_center_express	to 15.0(1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

CVE-2026-20117 is a cross-site scripting (XSS) vulnerability affecting the web-based management interface of Cisco Unified Contact Center Express (Unified CCX) and related Cisco Contact Center products.

This vulnerability exists because the interface does not sufficiently validate user-supplied input, allowing an unauthenticated, remote attacker to inject malicious script code into specific pages of the interface.

A successful exploit enables the attacker to execute arbitrary scripts in the context of the affected interface or access sensitive browser-based information.

Detection Guidance

I don't know

Impact Analysis

This vulnerability can allow an unauthenticated, remote attacker to execute arbitrary script code within the web-based management interface of affected Cisco products.

Such execution could lead to unauthorized access to sensitive browser-based information and potentially compromise the security of the management interface.

Because the attacker does not need prior authentication, the risk of exploitation is higher, potentially leading to data leakage or manipulation of the interface.

Compliance Impact

I don't know

Mitigation Strategies

Cisco strongly recommends upgrading to fixed software releases to remediate this vulnerability.

Upgrade Cisco Unified Contact Center Express to version 15.0 ES02 or later.
Verify hardware and software compatibility before performing the upgrade.

No workarounds are available for this vulnerability, so applying the fixed software release is the primary mitigation step.

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