Security audit

Unihiker K10 Ota

Security checks across malware telemetry and agentic risk

Overview

The skill is coherent as an OTA firmware-update helper, but its examples create an unauthenticated firmware flashing path with weak default AP credentials and insufficient security warnings.

Review before installing. This skill can be useful for K10 OTA updates, but do not copy the examples into deployed devices unchanged. Add authentication or signed firmware validation, use strong unique AP credentials, keep OTA mode short-lived and locally triggered where possible, and only run HTTP OTA on an isolated trusted network.

SkillSpector

By NVIDIA

Vulnerability Patterns

Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access

Findings (6)

Context-Inappropriate Capability

High

Confidence: 98% confidence
Finding: The guide implements firmware flashing at `/ota` with no authentication or authorization checks, allowing anyone with network access to replace device firmware. This is especially dangerous because the document positions the feature as a 'safe OTA maintenance mode' while also showing weak AP credentials, which lowers the barrier to unauthorized reflashing and device compromise.

Intent-Code Divergence

Medium

Confidence: 93% confidence
Finding: The text recommends entering OTA mode via a 'Trusted ESP-NOW command' or other triggers, but the sample code does not implement any trust validation, authorization, or anti-spoofing mechanism. Readers may copy this pattern and assume it is safe, enabling an attacker who can trigger maintenance mode to open an unauthenticated flashing interface.

Missing User Warnings

Medium

Confidence: 98% confidence
Finding: The skill documents an unauthenticated firmware upload endpoint at /ota and an example AP credential of "12345678" without prominent warnings or access controls. In practice, anyone on the same network or connected to the AP could upload arbitrary firmware, leading to full device compromise, persistence, and possible lateral movement if the device is trusted on the local network.

Missing User Warnings

High

Confidence: 97% confidence
Finding: The OTA instructions normalize posting firmware to `/ota` without warning that the endpoint accepts unauthenticated uploads that overwrite flash memory. In a firmware-update context, omission of this warning is security-relevant because it encourages deployment of a remote code execution path without basic protections.

Missing User Warnings

Medium

Confidence: 95% confidence
Finding: The example AP credentials `K10-OTA` / `12345678` are weak and predictable for a maintenance interface that can rewrite firmware. Attackers in radio range could join or target such a network more easily, especially if users deploy examples unchanged.

Missing User Warnings

Medium

Confidence: 91% confidence
Finding: The cURL and Python upload workflow sends firmware over plain HTTP without warning about confidentiality or integrity risks on untrusted networks. While local OTA over HTTP can be acceptable in a controlled environment, documenting it without constraints may lead users to expose firmware and update operations to interception or tampering.

VirusTotal

VirusTotal findings are pending for this skill version.

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Static analysis

No suspicious patterns detected.