CVE WatchOct 24, 2026

CVE-2026-116014

open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for

CVSS

8.1

High

EPSS

—

KEV

—

Exploit Today

0-100

Published: Oct 24, 2026 · Last modified: Oct 24, 2026 · CWE-190

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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