CVE-2026-54410

June 14, 2026, 6:17 p.m.

7.8
High

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.

Product(s) Impacted

Vendor Product Versions
Nanomodbus
  • Nanomodbus
  • 1.23.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-193
Off-by-one Error
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a nanomodbus nanomodbus 1.23.0 / / / / / / /

References

https://cwe.mitre.org/data/definitions/193.html
https://cwe.mitre.org/data/definitions/787.html
https://github.com/debevv/nanoMODBUS
https://github.com/debevv/nanoMODBUS/blob/v1.23.0/nanomodbus.c#L369

Tags

CWE-193
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
2026-06-14
CVE-2026-54410

CVSS Score

7.8 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: LOW
  • Integrity Impact: LOW
  • Availability Impact: HIGH
  • Exploit Maturity: PROOF_OF_CONCEPT

    • 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X

    View Vector String

Timeline

Published: June 14, 2026, 6:17 p.m.
Last Modified: June 14, 2026, 6:17 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.