CVE-2026-20302
Received Received - Intake

USB Driver Buffer Overflow in Cisco RoomOS

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Cisco Systems, Inc.

Description
A vulnerability in the USB driver of Cisco RoomOS could allow an unauthenticated, local attacker with physical access to the USB port on an affected device to execute arbitrary code with root privileges. This vulnerability is due to insufficient boundary checks for specific data that is provided through the USB driver. An attacker could exploit this vulnerability by connecting a malicious USB device to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the affected system and execute arbitrary code with root privileges.

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-19
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-20302
EUVD
EUVD-2026-62563

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
cisco roomos From 11.32.7.0 (inc)
cisco roomos From 11.40.1.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-120 The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Attack-Flow Graph

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Executive Summary

This is a stack overflow vulnerability in Cisco RoomOS that allows an unauthenticated local attacker with physical access to a USB port to execute arbitrary code with root privileges. It occurs due to insufficient boundary checks in the USB driver, which can lead to a buffer overflow when a malicious USB device is connected.

Detection Guidance

This vulnerability requires physical access to a USB port on an affected Cisco RoomOS device. Detection involves checking the RoomOS version against the fixed releases (11.32.7.0 or later for on-premises, 11.40.1.1 or later for cloud-aware). Use the command 'show version' on the device to verify the installed version.

Impact Analysis

An attacker could exploit this to gain full control of the affected device, potentially accessing sensitive data, installing malware, or disrupting operations. Physical access to the device is required for exploitation.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements such as GDPR or HIPAA. Organizations using affected Cisco RoomOS devices may face regulatory penalties or data breaches.

Mitigation Strategies

Immediately upgrade Cisco RoomOS to version 11.32.7.0 or later for on-premises systems, or 11.40.1.1 or later for cloud-aware systems. Ensure physical access to USB ports is restricted to authorized personnel only.

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