---
cve: "CVE-2026-54410"
severity: "HIGH"
cvss: 7.8
epss: "54%"
vendor: "debevv"
kev: false
exploited: false
published: "2026-06-14 18:17:20"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T23:24:03+02:00"
---

# CVE-2026-54410

> 7.8 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 91d6782930ee263bc760f27b0cbc5b82773c5f0d (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-54410) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_