Description
A hidden, persistent backdoor was found in Yarbo firmware v2.3.9 that provides remote, unauthenticated (or weakly authenticated) access to privileged functionality. The backdoor is undocumented, cannot be disabled via user-facing settings, and survives factory reset and ordinary firmware updates.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Yarbo | Firmware | ≤ 2.3.9 | — |