Path Traversal in Cisco Unity Connection
CVE-2026-20034
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Cisco Unity Connection — versions 12.5(1), 12.5(1)SU1, 12.5(1)SU2
- Cisco Unity Connection — versions 14.0, 14su1, 14su2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20034?
- CVE-2026-20034 is a high-severity vulnerability in Cisco Unity Connection, classified under Path Traversal: '.../...//'. CVSS score: 8.8/10. Published 2026-05-06.
- How severe is CVE-2026-20034?
- High severity. CVSS v3 base score is 8.8 out of 10.