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    2 vulnerabilities found for nanoMODBUS by debevv

    CVE-2026-54410 (GCVE-0-2026-54410)

    Vulnerability from nvd – Published: 2026-06-14 17:10 – Updated: 2026-06-15 17:05
    VLAI
    Summary
    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.
    Severity
    7.8 (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
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    debevv nanoMODBUS Affected: 0 , ≤ 1.23.0 (semver)
    		Create a notification for this product.
    Credits
    Burxonov Muslimbek
    Show details on NVD website
    To clipboard 

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    CVE-2026-54410 (GCVE-0-2026-54410)

    Vulnerability from cvelistv5 – Published: 2026-06-14 17:10 – Updated: 2026-06-15 17:05
    VLAI
    Summary
    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.
    Severity
    7.8 (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
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    debevv nanoMODBUS Affected: 0 , ≤ 1.23.0 (semver)
    		Create a notification for this product.
    Credits
    Burxonov Muslimbek
    Show details on NVD website
    To clipboard 

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