CVE-2026-20055
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
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided resources do not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
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]
How can this vulnerability impact me? :
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]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
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]
What immediate steps should I take to mitigate this vulnerability?
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]