CVE-2026-54410CWE-193CWE-787

CVE-2026-54410

High · published June 14, 2026

CVSS v3.1
8.6
EPSS
1%
Percentile
58.1
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00861 · 58.1th percentile
Weaknesses
CWE-193 · Off-by-one Error; CWE-787 · Out-of-bounds Write
Published
2026-06-14T22:17Z
References (4)
https://cwe.mitre.org/data/definitions/193.html · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://cwe.mitre.org/data/definitions/787.html · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/debevv/nanoMODBUS · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/debevv/nanoMODBUS/blob/v1.23.0/nanomodbus.c#L369 · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 14 JUN 17:10Z
    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…
    cvelistv5