CVE-2026-20302 Cisco RoomOS Stack Overflow Vulnerability
An attacker with physical access can execute arbitrary code with root privileges via a malicious USB device due to a buffer overflow in the USB driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20302?
CVE-2026-20302 is a medium-severity memory corruption vulnerability in Cisco RoomOS Software, published on 19 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-120
Which versions are affected by CVE-2026-20302?
How do I fix CVE-2026-20302?
No fix has been published for CVE-2026-20302 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-20302 being exploited?
There is no known exploitation of CVE-2026-20302 in the wild and no public exploit code.
Sources
Also known as GHSA-924p-6p4h-89mg.