CVE-2026-54410_CVE-2026-54410

7.8 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y

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. The overflow corrupts the adjacent buffer-index field of the nanoMODBUS state structure, resulting in denial of service through invalid memory accesses and, on bare-metal and RTOS targets without memory protection, one-byte information disclosure and writes to unintended register addresses on the Write Multiple Registers (FC16) handler path.

Basic Information

ID CVE-2026-54410

Source TuranSec

Published Jun 14, 2026 at 17:10

Affected Product

Vendor debevv

Product nanoMODBUS

Affected Versions debevv nanoMODBUS 0

CWE Classification

CWE-193 CWE-787

References

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    "published": "2026-06-14T17:10:12.275Z",
    "modified": "2026-06-14T17:10:12.275Z",
    "type": "cve",
    "title": "CVE-2026-54410",
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    "references": "https://github.com/debevv/nanoMODBUS\nhttps://github.com/debevv/nanoMODBUS/blob/v1.23.0/nanomodbus.c#L369\nhttps://cwe.mitre.org/data/definitions/193.html\nhttps://cwe.mitre.org/data/definitions/787.html",
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