CVE-2026-63035

Received Received - Intake

Heap Use-After-Free in open62541 TransferSubscriptions Service

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: ICS-CERT

Description

A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-30

Last Modified

2026-07-30

Generated

2026-07-31

AI Q&A

2026-07-31

EPSS Evaluated

N/A

NVD

CVE-2026-63035

EUVD

EUVD-2026-51334

Affected Vendors & Products

Vendor	Product	Version / Range
open62541	transfer_subscriptions	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a heap use-after-free vulnerability in the TransferSubscriptions service of open62541. It allows an authenticated attacker to potentially cause a denial of service or execute arbitrary code by exploiting a freed memory access issue.

Detection Guidance

Detection requires monitoring for heap use-after-free conditions in the TransferSubscriptions service of open62541. Check for crashes or memory corruption in the service logs. Use debugging tools like AddressSanitizer or Valgrind to identify use-after-free issues during execution.

Impact Analysis

An attacker could crash the system running open62541, leading to service disruption. In some cases, they might execute arbitrary code, which could allow further compromise of the system or data.

Compliance Impact

The vulnerability may allow an authenticated attacker to cause a denial of service or execute arbitrary code, which could lead to unauthorized data access or system disruption. This could impact compliance with GDPR by risking data confidentiality and integrity, and with HIPAA by potentially exposing protected health information.

Mitigation Strategies

Update open62541 to the latest version to patch the heap use-after-free vulnerability in the TransferSubscriptions service. If immediate update is not possible, disable the TransferSubscriptions service if not required to reduce attack surface.

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