---
id: "CVE-2026-114353"
kind: "vulnerability"
aliases: ["CVE-2026-114353"]
title: "DJI CrystalSky: hidden USB command lets a local attacker run root commands"
severity: "high"
cvss: 7.0
epss: 0.00206
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "CrystalSky ZS600C firmware", "fixed": [], "affected": ">= 0.3.9.7, <= 0.6.6.9", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["android", "crystalsky", "dji", "drones", "embedded", "eol", "infrastructure", "no-fix", "physical-access"]
not_affected_if: ["firmware-outside-range", "no-crystalsky-zs600c", "no-physical-access"]
published_at: "2026-10-23T14:17:33+00:00"
first_seen_at: "2026-10-23T21:57:34+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114353", "first_seen_at": "2026-10-23T21:57:34+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-25T03:37:59+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-114353", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# DJI CrystalSky: hidden USB command lets a local attacker run root commands

The root-privileged 'assistant' daemon on DJI CrystalSky ZS600C tablets contains an undocumented backdoor. A person with physical USB access who sends a hard-coded magic string over the USB serial port gets every following line run as a root shell command.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:CrystalSky ZS600C firmware affected >= 0.3.9.7, <= 0.6.6.9 fixed ?

## How to check

- Settings > About on the ZS600C: firmware v0.3.9.7 through v0.6.6.9 is affected, and every release is, since v0.6.6.9 is the last.
- Via adb or a shell, check whether the assistant daemon runs as root (ps -A | grep assistant) and whether /dev/ttyGS0 exists.

## Fix

No fix: v0.6.6.9 is the last release and the device is EOL/unsupported (per finder). No DJI advisory found. Mitigate by controlling physical and USB access, or retire the device.

## Timeline

- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114353
- 2026-10-25T03:37:59+00:00 analyst — Finder write-up (Cyber-Defence Campus) read: affected v0.3.9.7-0.6.6.9, which is the last release; device EOL so no vendor fix or DJI advisory found. Not exploited per OffSeq/NVD; no public PoC beyond the magic string.
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-114353

## Documents

- [advisory] assistant daemon hard-coded USB backdoor (Cyber-Defence Campus) https://cyber-defence-campus.github.io/projects/vulnerabilities/CVE-2026-114353/

## From the sources

Hidden functionality (undocumented backdoor) in the root-privileged 'assistant' daemon in DJI CrystalSky ZS600C firmware v0.3.9.7 through v0.6.6.9 on Android allows a physically-present attacker with USB access to execute arbitrary OS commands as root by sending the hard-coded magic string 'dji26656677' to the USB-gadget serial interface (/dev/ttyGS0), after which each subsequent line is passed to system().

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_