Is CVE-2026-116014 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116014?

CVE-2026-116014 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-116014

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.