---
id: CVE-2026-3437
title: >-
  An improper restriction of operations within the bounds of a memory buffer
  vulnerability in Portwell Engineering Toolkits version 4.8.2 could allow a
  local authenticated attacker to read and write to arbitrary memory via the
  Portwell Eng…
summary: >-
  An improper restriction of operations within the bounds of a memory buffer
  vulnerability in Portwell Engineering Toolkits version 4.8.2 could allow a
  local authenticated attacker to read and write to arbitrary memory via the
  Portwell Eng…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-119
published: '2026-03-03'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3437'
references:
  - url: >-
      https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-04.json
    label: ics-cert@hq.dhs.gov
  - url: 'https://software.portwell.tw/security-advisory/PWS-2026-3437.html'
    label: ics-cert@hq.dhs.gov
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-04'
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
epss: 0.00159
epssPercentile: 0.05479
ingestedAt: '2026-06-29T13:24:34.764Z'
---

## Overview

An improper restriction of operations within the bounds of a memory buffer vulnerability in Portwell Engineering Toolkits version 4.8.2 could allow a local authenticated attacker to read and write to arbitrary memory via the Portwell Engineering Toolkits driver. Successful exploitation of this vulnerability could result in escalation of privileges or cause a denial-of-service condition.

## Remediation

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