Cisco RoomOS up to 26.6.1.4 USB driver buffer overflow

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco RoomOS. The impacted element is an unknown function of the component USB driver. Performing a manipulation results in buffer overflow. This vulnerability was named CVE-2026-20302. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco RoomOS. This affects some unknown functionality of the component USB driver. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as 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, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is uniquely identified as CVE-2026-20302 since 10/08/2025. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/19/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Cisco

Name

• RoomOS

Version

• 10.3.2.0
• 10.3.2.4
• 10.3.3.0
• 10.3.4.0
• 10.8.2.5
• 10.8.3.1
• 10.8.4.0
• 10.11.2.2
• 10.11.3.0
• 10.11.4.1
• 10.11.5.2
• 10.11.6.0
• 10.15.2.2
• 10.15.3.0
• 10.15.4.1
• 10.15.5.3
• 10.19.2.2
• 10.19.3.0
• 10.19.4.2
• 10.19.5.6
• 11.1.2.4
• 11.1.3.1
• 11.1.4.1
• 11.5.2.4
• 11.5.3.3
• 11.5.4.6
• 11.9.2.4
• 11.9.3.1
• 11.14.2.1
• 11.14.2.3
• 11.14.3.0
• 11.14.4.0
• 11.14.5.0
• 11.17.2.2
• 11.17.3.0
• 11.17.4.0
• 11.20.2.3
• 11.20.3.0
• 11.23.1.6
• 11.23.1.8
• 11.24.1.5
• 11.24.2.4
• 11.24.3.0
• 11.24.4.1
• 11.27.2.0
• 11.27.3.0
• 11.27.4.0
• 11.27.5.0
• 11.28.1.3
• 11.31.1.5
• 11.32.2.1
• 11.32.3.0
• 11.32.4.0
• 11.32.5.1
• 11.32.6.0
• 11.33.1.7
• 11.34.1.2
• 11.35.1.2
• 11.36.1.1
• 11.37.1.0
• 11.38.1.1
• 11.39.1.1
• 26.0.1.2
• 26.1.1.5
• 26.2.2.2
• 26.3.1.3
• 26.4.1.4
• 26.4.1.6
• 26.5.2.0
• 26.5.2.2
• 26.6.1.4

License

• commercial

Website

• Vendor: https://www.cisco.com/

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