---
id: "CVE-2026-89057"
kind: "vulnerability"
aliases: ["CVE-2026-89057"]
title: "Lenovo tablets: authentication bypass lets local user gain device access"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Idea Tab Pro TB373FU", "fixed": ["17.5.10.107"], "affected": "< 17.5.10.107", "ecosystem": "vendor"}, {"name": "Tab K11 Gen 2 TB336FU", "fixed": ["17.5.10.348"], "affected": "< 17.5.10.348", "ecosystem": "vendor"}, {"name": "Tab K11 Gen 2 TB336ZU", "fixed": ["17.5.10.354"], "affected": "< 17.5.10.354", "ecosystem": "vendor"}, {"name": "Tab M11 TB330FU", "fixed": ["17.0.135"], "affected": "< 17.0.135", "ecosystem": "vendor"}, {"name": "Legion Tab TB321FU", "fixed": ["17.5.10.319"], "affected": "< 17.5.10.319", "ecosystem": "vendor"}, {"name": "Tab P12 TB370FU", "fixed": ["17.0.352"], "affected": "< 17.0.352", "ecosystem": "vendor"}, {"name": "Yoga Tab Plus TB520FU", "fixed": ["17.5.10.362"], "affected": "< 17.5.10.362", "ecosystem": "vendor"}]
ecosystems: []
tags: ["android", "endpoint", "firmware", "infrastructure", "lenovo", "physical-access", "tablets"]
not_affected_if: ["devices-not-physically-accessible", "firmware-updated", "no-lenovo-tablets"]
published_at: "2026-10-16T00:17:06+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T03:50:13+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89057", "first_seen_at": "2026-10-23T21:57:12+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-25T03:50:13+00:00"}]
---

# Lenovo tablets: authentication bypass lets local user gain device access

Some Lenovo tablets have a potential authentication bypass. A user with physical access to the device could gain unauthorized access to it.

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

## Affected

- vendor:Idea Tab Pro TB373FU affected < 17.5.10.107 fixed 17.5.10.107
- vendor:Tab K11 Gen 2 TB336FU affected < 17.5.10.348 fixed 17.5.10.348
- vendor:Tab K11 Gen 2 TB336ZU affected < 17.5.10.354 fixed 17.5.10.354
- vendor:Tab M11 TB330FU affected < 17.0.135 fixed 17.0.135
- vendor:Legion Tab TB321FU affected < 17.5.10.319 fixed 17.5.10.319
- vendor:Tab P12 TB370FU affected < 17.0.352 fixed 17.0.352
- vendor:Yoga Tab Plus TB520FU affected < 17.5.10.362 fixed 17.5.10.362

## How to check

On the tablet: Settings > About tablet > Build number / software version, and compare with the fixed build for your model (model number is on the same screen). Anything below the fixed build is affected.

## Fix

Update tablet firmware to at least the fixed build for your model (Lenovo advisory LEN-218699), e.g. Idea Tab Pro TB373FU 17.5.10.107, Tab K11 Gen 2 TB336FU 17.5.10.348 / TB336ZU 17.5.10.354, Tab M11 TB330FU 17.0.135, Legion Tab TB321FU 17.5.10.319, Tab P12 TB370FU 17.0.352, Yoga Tab Plus TB520FU 17.5.10.362. Other models are in the product list.

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-89057
- 2026-10-25T03:50:13+00:00 analyst — Lenovo advisory LEN-218699 unreadable (JS/403). Affected models and fixed firmware taken from the Lenovo CNA record as mirrored by EUVD-2026-102535; not verified against the vendor page. Physical access only, no exploitation or PoC found.

## Documents

- [advisory] EUVD-2026-102535 (CNA data from Lenovo: affected models and fixed firmware) https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-102535
- [advisory] Lenovo LEN-218699 Tablet Authentication Bypass (not readable: JS/403) https://support.lenovo.com/us/en/product_security/LEN-218699

## From the sources

A potential authentication bypass vulnerability was reported in some Lenovo tablets that could allow a user with physical access to gain unauthorized device access.

---

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