CVE-2026-63559
Received Received - Intake

Integer Overflow in open62541 UA_Variant Array Dimensions

Publication date: 2026-07-30

Last updated on: 2026-07-31

Assigner: ICS-CERT

Description
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.

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Meta Information

Published
2026-07-30
Last Modified
2026-07-31
Generated
2026-07-31
AI Q&A
2026-07-31
EPSS Evaluated
N/A
NVD
CVE-2026-63559
EUVD
EUVD-2026-51332

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
open62541 ua_variant *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

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Executive Summary

This vulnerability is an integer overflow in the UA_Variant arrayDimensions product computation in open62541. It may allow a remote attacker to read out-of-bounds heap memory, potentially disclosing sensitive information.

Detection Guidance

This vulnerability involves an integer overflow in UA_Variant arrayDimensions computation in open62541. Detection requires checking for affected versions of open62541 and monitoring for unusual memory access patterns or out-of-bounds reads. No specific commands are provided in the context.

Impact Analysis

A remote attacker could exploit this to read sensitive data from memory that they should not have access to. This could include confidential information processed by the affected system.

Compliance Impact

This vulnerability may allow disclosure of sensitive information due to out-of-bounds heap memory read, which could lead to violations of data protection regulations like GDPR or HIPAA if exploited.

Mitigation Strategies

Update open62541 to the latest version to address the integer overflow in UA_Variant arrayDimensions computation. Monitor vendor advisories for patches and apply them promptly.

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