CVE-2026-116014

HighCVSS 8.1/10Last modified Oct 24, 2026

Description

open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for large custom structure definitions. A malicious OPC UA server can supply DataType definitions via UA_Client_getRemoteDataTypes(), causing decodeBinaryStructure() to overflow the heap, crashing clients or enabling code execution.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-190

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
open62541open62541>= 1.5.0, < 1.5.7

References

Timeline

Published
Oct 24, 2026
Last modified
Oct 24, 2026
NVD status
Received

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