High severity · published Mar 3, 2026
CVE-2026-3437
Improper Restriction of Operations within the Bounds of a Memory Buffer in Portwell Engineering Toolkits
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PE
Portwell Engineering Toolkits · Portwell
through 4.8.2 · source: vendor
ET
Engineering Toolkits · Portwell
4.8.2 · source: NVD
In the news
VulnerabilityHigh
Portwell Engineering Toolkits
View CSAF
Summary
Successful exploitation of this vulnerability could allow a local attacker to escalate privileges or cause a denial-of-service condition.
The following versions of Portwell Engineering Toolkits are affected:
Portwell Engineering Toolkits 4.8.2
CVSS
Vendor
Equipment
Vulnerabilities
v3 8.8
Portwell
Portwell Engineering Toolkits
Improper Restriction of Operations within the Bounds of a Memory Buffer
Background
Critical Infrastructure Sectors: Critical Manufacturing, Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
Vulnerabilities
Expand All +
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.
View CVE Details
Affected Products
Portwell Engineering Toolkits
Vendor: Portwell
Product Version: Portwell Portwell Engineering Toolkits: 4.8.2
Product Status: known_affected
Remediations
Vendor fix Portwell has not responded to requests to work with CISA to mitigate this vulnerability. Users of affected versions of Portwell Engineering Toolkits are invited to contact ...
Mar 3, 2026·CISA Advisories
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3437
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3437
github.com
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-062-04.json
software.portwell.tw
https://software.portwell.tw/security-advisory/PWS-2026-3437.html
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-062-04
