CVE-2026-3437
CVE-2026-3437 is a high-severity vulnerability in Portwell Engineering Toolkits with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v4: 9.3
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-9310
- Weakness: CWE-119
- Affected product: Portwell Engineering Toolkits
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-3437?
- CVE-2026-3437 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-3437 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-3437?
- CVE-2026-3437 affects Portwell Engineering Toolkits. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-3437?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-3437 have an EU (EUVD) identifier?
- Yes. CVE-2026-3437 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9310.
- When was CVE-2026-3437 published?
- CVE-2026-3437 was published on 2026-03-03 and last updated on 2026-06-25.
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-04.json
- https://software.portwell.tw/security-advisory/PWS-2026-3437.html
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-04
Affected products (1)
- cpe:2.3:a:portwell:engineering_toolkits:4.8.2:*:*:*:*:*:*:*
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