CVE-2026-20055
Unknown Unknown - Not Provided

Authenticated XSS in Cisco Packaged and Unified CCE Web Interface

Publication date: 2026-01-21

Last updated on: 2026-01-21

Assigner: Cisco Systems, Inc.

Description
Multiple vulnerabilities in the web-based management interface of Cisco Packaged Contact Center Enterprise (Packaged CCE) and Cisco Unified Contact Center Enterprise (Unified CCE) could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device.  These vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities 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. To exploit these vulnerabilities, the attacker must have valid administrative credentials.

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Meta Information

Published
2026-01-21
Last Modified
2026-01-21
Generated
2026-07-06
AI Q&A
2026-01-21
EPSS Evaluated
2026-07-05
NVD
CVE-2026-20055
EUVD
EUVD-2026-3652

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
cisco packaged_contact_center_enterprise 12.6(2)_es101
cisco unified_contact_center_enterprise 12.6(2)_es101
cisco packaged_contact_center_enterprise 15.0(1)es202511
cisco unified_contact_center_enterprise 15.0(1)es202511

Helpful Resources

Exploitability

CWE
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KEV
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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

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Executive Summary

This vulnerability involves multiple cross-site scripting (XSS) flaws in the web-based management interfaces of Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise. It occurs because the interface does not properly validate user-supplied input, allowing an authenticated remote attacker with valid administrative credentials to inject malicious script code into specific pages. Successful exploitation lets the attacker execute arbitrary scripts within the interface context and potentially access sensitive browser-based information. [1]

Compliance Impact

The provided resources do not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Impact Analysis

If exploited, this vulnerability could allow an attacker with administrative access to execute arbitrary scripts in the web-based management interface, potentially exposing sensitive information accessible through the browser. This could lead to unauthorized actions within the management interface or leakage of confidential data. However, exploitation requires valid administrative credentials and user interaction. [1]

Detection Guidance

There are no specific detection commands or network/system detection methods provided for this vulnerability. Detection would generally require verifying if the affected Cisco Packaged Contact Center Enterprise (Packaged CCE) or Cisco Unified Contact Center Enterprise (Unified CCE) versions are in use and if the web-based management interface is accessible to authenticated users. Since exploitation requires valid administrative credentials and involves injection of malicious scripts into the interface, monitoring for unusual script activity or unauthorized administrative access might help, but no explicit commands or detection tools are mentioned. [1]

Mitigation Strategies

Immediate mitigation steps include upgrading affected Cisco Packaged CCE and Unified CCE devices to the fixed software versions: 12.6(2)_ES101 and later for CVE-2026-20055. There are no workarounds available. Customers should obtain fixed software through Cisco or authorized partners, ensure valid licenses and support contracts, verify device compatibility, and consult Cisco Technical Assistance Center (TAC) if needed. [1]

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