# CVE-2026-20302: Cisco RoomOS buffer overflow in USB driver

Source: https://junglewise.ai/threats/cve-2026-20302-cisco-roomos-buffer-overflow-in-usb-driver  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-19. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-20302 · Severity: medium · CVSS 6.1 · Published 2026-08-19

Cisco RoomOS is a software platform used in video conferencing and collaboration devices. A flaw in its USB driver could allow an attacker with physical access to a USB port to run malicious code with the highest system privileges, potentially compromising the entire device and any communications or data passing through it.

Technologies: [Cisco RoomOS](https://junglewise.ai/threats/technologies/roomos). Vendors: [Cisco](https://junglewise.ai/threats/vendors/cisco).

## Quick answers

**Is CVE-2026-20302 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-20302 being exploited in the wild.

**How severe is CVE-2026-20302?** Medium severity, with a CVSS score of 6.1, published 19 August 2026.

**Which products and versions are affected?** Cisco RoomOS 11 and earlier, 26 before 26.7.2.2 (on-premises) or 26.7.1.12 (cloud-aware).

**Is there a fix for CVE-2026-20302?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-20302 attacked?** It is attacked with physical access, in a network appliance.

**Am I affected by CVE-2026-20302?** Check whether you run Cisco RoomOS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a buffer overflow vulnerability (CWE-120) in the USB driver of Cisco RoomOS caused by insufficient boundary checks on data passed through the USB interface. The vulnerability requires an attacker to have physical access to connect a malicious USB device; no authentication or network access is required. A successful exploit allows an unauthenticated local attacker to trigger a stack overflow and execute arbitrary code with root privileges. Cisco has released fixed software: RoomOS 11.32.7.0 or later for on-premises deployments, and 11.40.1.1 or later for cloud-aware deployments; version 26 users should upgrade to 26.7.2.2 or 26.7.1.12.

## Affected products

- Cisco RoomOS 11 and earlier, 26 before 26.7.2.2 (on-premises) or 26.7.1.12 (cloud-aware)

## Timeline

- 2026-08-19: disclosed

## References

- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-roomos-bof-vTMANZgu](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-roomos-bof-vTMANZgu)

## Related threats

- [Cisco RoomOS information disclosure in logging subsystem](https://junglewise.ai/threats/cve-2026-20289-cisco-roomos-information-disclosure-in-logging-subsystem)
- [Cisco RoomOS denial of service in exceptional condition handling](https://junglewise.ai/threats/cve-2026-20187-cisco-roomos-denial-of-service-in-exceptional-condition-handling)
- [Cisco RoomOS improper resource control denial of service](https://junglewise.ai/threats/cve-2026-20158-cisco-roomos-improper-resource-control-denial-of-service)
- [Cisco RoomOS missing encryption for sensitive data](https://junglewise.ai/threats/cve-2026-20157-cisco-roomos-missing-encryption-for-sensitive-data)
- [Cisco RoomOS memory buffer vulnerabilities](https://junglewise.ai/threats/cve-2026-20156-cisco-roomos-memory-buffer-vulnerabilities)