Buffer overflow in Portwell Engineering Toolkits
CVE-2026-3437
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Portwell Engineering Toolkits — versions 4.8.2
- Portwell Engineering Toolkits — versions v5.0.0, 4.8.2, 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.cisa.gov/news-events/ics-advisories/icsa-26-062-04 (VDB Entry, Third Party Advisory, government-resource)
- software.portwell.tw/security-advisory/PWS-2026-3437.html (vendor-advisory, patch)
- github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-04.js…
Frequently asked questions
- What is CVE-2026-3437?
- CVE-2026-3437 is a high-severity vulnerability in Portwell Engineering Toolkits, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-03.
- How severe is CVE-2026-3437?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-3437 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.