CVE-2026-20034 HIGH

CVE-2026-20034: Cisco Unity Connection Remote Code Execution Vulnerability

Vendor Cisco
Product Cisco Unity Connection
Weakness CWE-35
Published May 6, 2026
Last update May 7, 2026

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.

Key dates

02Disclosure timeline

May 6, 2026 CVE published
May 7, 2026 Record updated