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.
CVSS Score
HIGH
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-54410?
CVE-2026-54410 is a vulnerability with a CVSS score of 8.6 (HIGH). 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...
How severe is CVE-2026-54410?
CVE-2026-54410 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54410?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.