CVE-2026-20034

Cisco Unity Connection Remote Code Execution Vulnerability

Published May 6, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.&nbsp;To exploit this vulnerability, the attacker must have valid user credentials on the affected device.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Cisco
Cisco unity Connection
Vendors & Products Cisco
Cisco unity Connection
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.&nbsp;To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
Title Cisco Unity Connection Remote Code Execution Vulnerability
Weaknesses CWE-35
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
May 7, 2026, 3:55 AM
Reserved
Oct 8, 2025, 11:59 AM
Status
Analyzed
Published
May 6, 2026, 5:16 PM
Modified
Oct 26, 2026, 7:10 PM