High severity · published May 27, 2026
CVE-2026-40851
Command injection via USB
8.4
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RE
REX100 · Helmholz
0.0.0 through 3.0.2; 3.0.2 · source: vendor
RE
REX200/250 · Helmholz
0.0.0 through 8.4.4; 8.4.4 · source: vendor
MB
mbNET.mini · MB connect line
0.0.0 through 3.0.2; 3.0.2 · source: vendor
MB
mbNET/mbNET.rokey · MB connect line
0.0.0 through 8.4.4; 8.4.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40851
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40851
www.certvde.com
https://www.certvde.com/en/advisories/VDE-2026-054/
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