CVE-2026-20034
Remote Code Execution in Cisco Unity Connection
Publication date: 2026-05-06
Last updated on: 2026-05-06
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | unity_connection | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-35 | The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The vulnerability allows an authenticated, remote attacker to execute arbitrary code as root on the affected Cisco Unity Connection device, potentially leading to complete compromise of the device.
Such a compromise could result in unauthorized access to sensitive data or disruption of services, which may impact compliance with data protection standards and regulations like GDPR and HIPAA that require safeguarding of personal and health information.
However, the provided information does not explicitly describe the direct effects on compliance with these standards.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade to the fixed software releases provided by Cisco for Cisco Unity Connection, such as versions 14SU5, 15SU4, or apply the specific patch file for version 15.0.
There are no available workarounds, so applying the official updates is the recommended immediate step to prevent exploitation.
Can you explain this vulnerability to me?
This vulnerability exists in the web-based management interface of Cisco Unity Connection. It allows an authenticated remote attacker to execute arbitrary code on the affected device by submitting a specially crafted API request. The root cause is insufficient validation of user-supplied input, which enables the attacker to run code with root privileges, potentially leading to full device compromise.
How can this vulnerability impact me? :
If exploited, this vulnerability can allow an attacker with valid credentials to execute arbitrary code as root on the affected device. This could result in complete compromise of the device, including unauthorized access, data manipulation, disruption of services, and potential further attacks within the network.