CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-35 |
| Vendor | cisco |
| Product | cisco unity connection |
| Ecosystems | |
| Industries | NetworkingTelecommunications |
| Published | May 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Cisco / Cisco Unity Connection
12.5(1) 12.5(1)SU1 12.5(1)SU2 12.5(1)SU3 12.5(1)SU4 14 12.5(1)SU5 14SU1 12.5(1)SU6 14SU2 12.5(1)SU7 14SU3 12.5(1)SU8 14SU3a 12.5(1)SU8a 15 15SU1 14SU4 12.5(1)SU9 15SU2 15SU3