CVE-2026-54410

HighCVSS 8.6/10Last modified Aug 10, 2026

Description

nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Weakness enumeration

CWE-193 CWE-787

Affected software

No affected versions have been published.

Timeline

Published: Jun 14, 2026
Last modified: Aug 10, 2026
NVD status: Deferred

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