TI-2026-16269 Aliases CVE-2026-20055 GHSA-q34h-v5h2-c3hf

Cisco Packaged Contact Center Enterprise & Cisco Unified Contact Center Enterprise Cross-Site Scripting Vulnerability

LOW 21CWE-79Published 2026-01-21 · Updated 2026-01-21

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00207 10th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
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)	—	No fix listed	CNA
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	—	No fix listed	CNA

Cisco Packaged Contact Center Enterprise VendorCisco Affected 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) Fixed in — No fix listed CNA
Cisco Unified Contact Center Enterprise VendorCisco Affected 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 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-20055
2026-10-03 Alias added: GHSA-q34h-v5h2-c3hf

References

Other 1

cisco-sa-ucce-pcce-xss-2JVyg3uD

TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0

See all 7059 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences