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Description

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.

PUBLISHED Reserved 2026-03-02 | Published 2026-03-03 | Updated 2026-06-25 | Assigner icscert




CRITICAL: 9.3CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

HIGH: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

Product status

Default status
unaffected

Any version
affected

v5.0.0
unaffected

Credits

Jason Huang from Cyber Threat & Product Defense Center of TXOne Networks Inc. finder

References

software.portwell.tw/security-advisory/PWS-2026-3437.html vendor-advisory patch

www.cisa.gov/news-events/ics-advisories/icsa-26-062-04

github.com/...p/csaf_files/OT/white/2026/icsa-26-062-04.json

cve.org (CVE-2026-3437)

nvd.nist.gov (CVE-2026-3437)

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