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CVE-2026-54410— nanoMODBUS Off-by-One Buffer Overflow in recv_msg_header() via Crafted MBAP Length Field

CVSS 8.6 · High EPSS 0.54% · P43

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
debevvnanoMODBUS≤ 1.23.0affected
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I. Basic Information for CVE-2026-54410

Vulnerability Information
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Vulnerability Title
nanoMODBUS Off-by-One Buffer Overflow in recv_msg_header() via Crafted MBAP Length Field
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Vulnerability Title
Valerio De Benedetto nanoMODBUS 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Valerio De Benedetto nanoMODBUS是Valerio De Benedetto个人开发者的一款适用于嵌入式/微控制器的紧凑型MODBUS RTU/TCP C库。 Valerio De Benedetto nanoMODBUS 1.23.0及之前版本存在安全漏洞，该漏洞源于recv_msg_header()函数中存在差一错误缓冲区溢出，可能导致未经身份验证的远程攻击者发送特制的MBAP帧，越界写一个字节并破坏相邻的buffer-index字段，导致无效内存访问从而造成拒绝服务，在无
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
debevvnanoMODBUS 0 ~ 1.23.0 -

II. Public POCs for CVE-2026-54410

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10707 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-54410

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Other References for CVE-2026-54410 (1)

IV. Related Vulnerabilities

Same product: nanoMODBUS
Same vendor: debevv
Same weakness: CWE-193

V. Comments for CVE-2026-54410

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