CVE-2026-67862

Received Received - Intake

Buffer Overflow in open62541 Client Library

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: MITRE

Description

open62541 1.5.5 contains a buffer-overflow in the high-level attribute reading logic in src/client/ua_client_highlevel.c. This allows a remote attacker to cause a denial of service.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-04

Last Modified

2026-08-04

Generated

2026-08-05

AI Q&A

2026-08-05

EPSS Evaluated

N/A

NVD

CVE-2026-67862

Affected Vendors & Products

Vendor	Product	Version / Range
open62541	open62541	1.5.5

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer-overflow issue in open62541 version 1.5.5. It exists in the high-level attribute reading logic located in src/client/ua_client_highlevel.c. A remote attacker can exploit this to cause a denial of service by triggering an overflow.

Impact Analysis

The impact is a denial of service, meaning the affected system may become unresponsive or crash. This can disrupt services relying on open62541 for OPC UA communication.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The vulnerability is a buffer overflow in open62541 1.5.5 that could lead to denial of service, but no direct compliance implications are mentioned.

Mitigation Strategies

Update open62541 to a version later than 1.5.5 to address the buffer-overflow vulnerability in the high-level attribute reading logic.

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