Vulnerability · Published May 27, 2026 · Assigned by CERTVDE
CVE-2026-40851Command injection via USB
High 8.4
In plain English
A high-severity security flaw in REX100 from Helmholz. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.1%top 97.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A local attacker can perform a confusion attack on the cfgparser via a specially crafted file on an USB stick leading to code execution. This can result in a total loss of confidentiality, integrity and availability.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MB connect line | mbNET/mbNET.rokey | 0.0.0 – through 8.4.4 |
| MB connect line | mbNET.mini | 0.0.0 – through 3.0.2 |
| MB connect line | mbNET/mbNET.rokey | 8.4.4 |
| MB connect line | mbNET.mini | 3.0.2 |
| Helmholz | REX200/250 | 0.0.0 – through 8.4.4 |
| Helmholz | REX100 | 0.0.0 – through 3.0.2 |
| Helmholz | REX200/250 | 8.4.4 |
| Helmholz | REX100 | 3.0.2 |
Weakness: CWE-1287 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H