Paper/Archive/CVE-2026-3437

CVE-2026-3437

Portwell Portwell Engineering Toolkits — Improper Restriction of Operations within the Bounds of a Memory Buffer in Portwell Engineering Toolkits

EPSS 0.2%CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (CNA)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 7.2.072 × 201.4 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Portwell Engineering Toolkits≤ 4.8.2v5.0.0CNA

Scores by source

icscert (CNA)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

icscert (CNA)8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchsoftware.portwell.tw/security-advisory/PWS-2026-3437.html refcisa.gov/news-events/ics-advisories/icsa-26-062-04 refgithub.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-04.json