CVE-2026-20034

High

Description

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.

SeverityHigh
CVSS8.8
Exploit probability—
ProductCisco Unity Connection
PublishedMay 6, 2026
First seenMay 6, 2026
Weakness typeCWE-35CWE-35

How to fix

Update
  • cisco unity_connection14.0 or later

Affected products

ProductAffected versionsFixed in
cisco unity_connectionv < 14.0, 14.0, 14su1, 14su2, 14su3, 14su4, 15.0, 15su1, 15su2, 15su314.0

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