CVE-2026-71263 FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool()

The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool demo/LINUXTCP/port/porttcp.c. The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MBTCPBUFSIZE limit...

CVE-2026-71263

The FreeModbus LINUXTCP port has a concrete defect in xMBPortTCPPool(): the code uses a strict greater-than check (usTCPFrameBytesLeft > MB_TCP_BUF_SIZE) against a 263-byte MB_TCP_BUF_SIZE limit. When an MBAP frame with Length 264 is processed, usTCPFrameBytesLeft becomes 263, the check passes...

CVE-2026-71263 FreeModbus LINUXTCP Port Off-by-One Global Buffer Overflow in xMBPortTCPPool()

The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool demo/LINUXTCP/port/porttcp.c. The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MBTCPBUFSIZE limit...

CVE-2026-71254

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handlereadfilerecord function FC 0x14, Read File Record in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's recordlength is at most 124, but i...

CVE-2026-71255

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recvreaddeviceidentificationres function FC 0x2B/MEI 0x0E, Read Device Identification in nanomodbus.c. The server-supplied objectlength field 0-246 is validated only against the remaining PDU size ressizeleft and...

CVE-2026-71255 nanoMODBUS Client-Side Out-of-Bounds Write via object_length in recv_read_device_identification_res()

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recvreaddeviceidentificationres function FC 0x2B/MEI 0x0E, Read Device Identification in nanomodbus.c. The server-supplied objectlength field 0-246 is validated only against the remaining PDU size ressizeleft and...

EUVD-2026-53332

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recvreaddeviceidentificationres function FC 0x2B/MEI 0x0E, Read Device Identification in nanomodbus.c. The server-supplied objectlength field 0-246 is validated only against the remaining PDU size ressizeleft and...

CVE-2026-71255

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus client-side recvreaddeviceidentificationres function FC 0x2B/MEI 0x0E, Read Device Identification in nanomodbus.c. The server-supplied objectlength field 0-246 is validated only against the remaining PDU size ressizeleft and...

CVE-2026-71254 nanoMODBUS Server-Side Out-of-Bounds Write in handle_read_file_record()

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handlereadfilerecord function FC 0x14, Read File Record in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's recordlength is at most 124, but i...

EUVD-2026-53331

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handlereadfilerecord function FC 0x14, Read File Record in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's recordlength is at most 124, but i...

CVE-2026-71254

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handlereadfilerecord function FC 0x14, Read File Record in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's recordlength is at most 124, but i...

CVE-2026-71254: Out-of-bounds Write

nanoMODBUS through v1.23.0 contains an out-of-bounds write in the Modbus server-side handlereadfilerecord function FC 0x14, Read File Record in nanomodbus.c. The function validates that the total request size does not exceed 245 bytes and that each sub-request's recordlength is at most 124, but i...

Debian dla-4714 : libmodbus-dev - security update

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4714 advisory. - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4714-1 [email protected] https://www.debian.org/lts/security/...

[SECURITY] [DLA 4714-1] libmodbus security update

------------------------------------------------------------------------- Debian LTS Advisory DLA-4714-1 [email protected] https://www.debian.org/lts/security/ Thorsten Alteholz August 01, 2026 https://wiki.debian.org/LTS -...

CVE-2026-44107

A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack...

CVE-2026-44092

An unauthenticated remote attacker can inject malicious input into the ModbusServer application because it does not validate the input it fetches from MQTT. This may lead to integrity and availability loss...

CVE-2026-44107 Exposed Reboot via Modbus

A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack...

CVE-2026-44107 Exposed Reboot via Modbus

A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack...

CVE-2026-44107

A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack...

EUVD-2026-51042

A reboot of the charging controller can be triggered via Modbus TCP without authentication. Therefore, when the Modbus functionality is enabled by opening the port that CharxModbusServer is listening, an unauthenticated attacker can perform a Denial-of-Service attack...