---
id: CVE-2026-88781
title: "Untrusted Pointer Dereference in ASUS certain motherboards firmware\_allows a kernel-level privileges\_user can supply an arbitrary memory address via an I/O command, leading to subsequent system information being tampered with or causing …"
summary: "Untrusted Pointer Dereference in ASUS certain motherboards firmware\_allows a kernel-level privileges\_user can supply an arbitrary memory address via an I/O command, leading to subsequent system information being tampered with or causing …"
severity: medium
cvss: 6.8
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-822
vendor: ASUS
product: motherboards firmware
affected:
  - motherboards_firmware A520/B550 series Before 3644 4304
  - motherboards_firmware X570 Series Before 5054
  - motherboards_firmware A620/A620A Series Before 4003 4004
  - motherboards_firmware B650 Series Before 1303 4003 4004
  - motherboards_firmware X670 Series Before 4003 4004
  - motherboards_firmware B840 Series Before 1804
  - motherboards_firmware B850 Series Before 1103 1804 2503
  - motherboards_firmware X870 Series Before 1804 2503
  - "motherboards_firmware X870E Series \tBefore 1103 2503"
  - motherboards_firmware Knoll Series Before 4003
  - motherboards_firmware TRX50 Series Before 0703 1403
  - motherboards_firmware W790 Series Before 2101
  - motherboards_firmware WRX90 Series Before 1403
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T02:01:00.588Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-88781'
references:
  - url: 'https://www.asus.com/security-advisory'
tags:
  - cve.org
epss: 0.00112
epssPercentile: 0.01353
ingestedAt: '2026-10-27T16:11:59.206Z'
---

## Overview

Untrusted Pointer Dereference in ASUS certain motherboards firmware allows a kernel-level privileges user can supply an arbitrary memory address via an I/O command, leading to subsequent system information being tampered with or causing a system crash.
Refer to the 'Security Update for Multiple ASUS Motherboards' section on the ASUS Security Advisory for more information.

## Affected

- `motherboards_firmware A520/B550 series Before 3644 4304`
- `motherboards_firmware X570 Series Before 5054`
- `motherboards_firmware A620/A620A Series Before 4003 4004`
- `motherboards_firmware B650 Series Before 1303 4003 4004`
- `motherboards_firmware X670 Series Before 4003 4004`
- `motherboards_firmware B840 Series Before 1804`
- `motherboards_firmware B850 Series Before 1103 1804 2503`
- `motherboards_firmware X870 Series Before 1804 2503`
- `motherboards_firmware X870E Series 	Before 1103 2503`
- `motherboards_firmware Knoll Series Before 4003`
- `motherboards_firmware TRX50 Series Before 0703 1403`
- `motherboards_firmware W790 Series Before 2101`
- `motherboards_firmware WRX90 Series Before 1403`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.