Path traversal in Cisco Unity Connection - CVE-2026-20034
Published: May 7, 2026
Vulnerability identifier: #VU130416
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20034
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in the web-based management interface. A remote user can send a specially crafted API request and upload arbitrary files on the system, leading to arbitrary code execution.
Affected software
Cisco Unity Connection
How to mitigate CVE-2026-20034
Install updates from vendor's website.
Cisco Unity Connection - addressed in versions 14SU5, 15SU4