---
id: "CVE-2026-79589"
kind: "vulnerability"
aliases: ["CVE-2026-79589"]
title: "U-speed WIFI4 N300 T1 Pro router: exposed UART gives unauthenticated root shell"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "U-speed WIFI4 N300 T1 Pro", "fixed": [], "affected": "v1.0.0", "ecosystem": "hardware"}]
ecosystems: []
tags: ["infrastructure", "iot", "physical-access", "router", "t1-pro", "u-speed", "uart", "wifi4-n300"]
not_affected_if: ["no-physical-access", "other-models"]
published_at: "2026-10-29T14:17:59+00:00"
first_seen_at: "2026-10-29T14:25:23+00:00"
updated_at: "2026-10-29T14:27:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79589", "first_seen_at": "2026-10-29T14:25:23+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-29T14:27:49+00:00"}]
---

# U-speed WIFI4 N300 T1 Pro router: exposed UART gives unauthenticated root shell

The U-speed WIFI4 N300 router (model T1 Pro, v1.0.0) exposes a UART debug interface with no authentication or access control. Anyone who connects to that interface gets a root shell on the device.

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

## Affected

- hardware:U-speed WIFI4 N300 T1 Pro affected v1.0.0 fixed ?

## How to check

- Model T1 Pro (U-speed WIFI4 N300), firmware v1.0.0 (how to read the version is not stated in the sources).
- Open the case and look for UART test pads; the researcher connected at 38400 baud and got a root shell with no login. Anyone with physical access can do this.

## Timeline

- 2026-10-29T14:25:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-79589
- 2026-10-29T14:27:49+00:00 analyst — Only the researcher's GitHub disclosure (milkinit) found; no vendor advisory, no firmware fix located, NVD page returned nothing via web-cli. Researcher remediation: disable UART / add auth. Fix status left unknown (no vendor page saying none). Nothing verified. Sibling CVE-2026-79588 (cleartext HTTP creds) same device.

## Documents

- [poc] milkinit disclosure: U-speed T1 Pro UART root shell https://github.com/milkinit/cve-disclosures/tree/main/IoT/CVE-2026-79589

## From the sources

The WIFI4 N300 router (Model: T1 Pro) v1.0.0 by U-speed contains an insecure access control flaw that allows an attacker to gain unauthenticated root shell. The vulnerability is caused by the exposure of the UART debugging interface having a lack of authentication, authorization and access control functionality. Once the interface is soldered and connected to the attacker, they gain root privilege to the 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_