Answer in brief
CVE-2026-3437 records a Critical severity (CVSS 9.3) vulnerability in Improper Restriction of Operations within the Bounds of a Memory Buffer in Portwell Engineering Toolkits. The current sources do not mark it as known exploited. The current feed maps Portwell/Portwell Engineering Toolkits (generic), Portwell/Portwell Engineering Toolkits (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Portwell/Portwell Engineering Toolkits (generic), Portwell/Portwell Engineering Toolkits (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Portwell/Portwell Engineering Toolkitsgeneric | 0 | Not reported |
| Portwell/Portwell Engineering Toolkitsgeneric | >=0 <=4.8.2 | Not reported |
Published upstream
Mar 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.