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TI-2026-16273 Aliases CVE-2026-20059GHSA-83qv-c52p-jx5j

Cisco Unity Connection Reflected Cross-Site Scripting Vulnerability

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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

A vulnerability in the web-based management interface of Cisco Unity Connection could allow an unauthenticated, remote attacker to conduct a reflected XSS attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00193 9th 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

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Unity Connection14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4—No fix listedCNA
  • Cisco Unity Connection VendorCisco Affected 14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4 Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:*up to 12.5VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14.0:*:*:*:*:*:*:*14.0VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su1:*:*:*:*:*:*:*14su1VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su2:*:*:*:*:*:*:*14su2VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su3:*:*:*:*:*:*:*14su3VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su3a:*:*:*:*:*:*:*14su3aVulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su4:*:*:*:*:*:*:*14su4VulnerableCisco
cpe:2.3:a:cisco:unity_connection:14su5:*:*:*:*:*:*:*14su5VulnerableCisco
cpe:2.3:a:cisco:unity_connection:15.0:*:*:*:*:*:*:*15.0VulnerableCisco
cpe:2.3:a:cisco:unity_connection:15su1:*:*:*:*:*:*:*15su1VulnerableCisco
  • cpe:2.3:a:cisco:unity_connection:*:*:*:*:*:*:*:* Versions up to 12.5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14.0:*:*:*:*:*:*:* Versions 14.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su1:*:*:*:*:*:*:* Versions 14su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su2:*:*:*:*:*:*:* Versions 14su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su3:*:*:*:*:*:*:* Versions 14su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su3a:*:*:*:*:*:*:* Versions 14su3a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su4:*:*:*:*:*:*:* Versions 14su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:14su5:*:*:*:*:*:*:* Versions 14su5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:15su1:*:*:*:*:*:*:* Versions 15su1 Vulnerable ·Cisco
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:cisco:unity_connection:15su2:*:*:*:*:*:*:*15su2VulnerableCisco
cpe:2.3:a:cisco:unity_connection:15su3:*:*:*:*:*:*:*15su3VulnerableCisco
  • cpe:2.3:a:cisco:unity_connection:15su2:*:*:*:*:*:*:* Versions 15su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unity_connection:15su3:*:*:*:*:*:*:* Versions 15su3 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20059
  2. 2026-10-03 Alias added: GHSA-83qv-c52p-jx5j

References

Advisory 1

  • TI-2026-16259 Cisco Unified Communications Products Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-13188 Deserialization of untrusted data in Cisco Unified Contact Center Enterprise CVSS 3.1CRITICAL 10.0
  • TI-2024-13207 Unrestricted file upload in Cisco Unity Connection CVSS 3.1CRITICAL 9.8
  • TI-2017-09109 Improper authentication in Cisco Voice Operating System CVSS 3.0CRITICAL 9.8
  • TI-2021-01089 Cisco Unified Communications Products Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
See all 64 →

Sources

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