CVE-2026-9397

A weakness has been identified in Besen BS20 EV Charging Station up to 20260426. Affected by this issue is some unknown functionality of the component OTA Update Installation Handler. This manipulation causes improper authorization. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The original disclosure mentions, that "[t]hese vulnerabilities have been reported to Besen and we have received their acknowlegement that they are reviewing this as of April 2026."

CVSS v3 8.1 HIGH
CVSS v2.0 7.6 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.6^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:H/Au:N/C:C/I:C/A:C

Exploitability : 4.9 / Impact : 10.0

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates
https://vuldb.com/submit/813576
https://vuldb.com/vuln/365378
https://vuldb.com/vuln/365378/cti

Configurations

No configuration.

History

24 May 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-24 21:16

Updated : 2026-05-26 19:57

NVD link : CVE-2026-9397

Mitre link : CVE-2026-9397

CVE.ORG link : CVE-2026-9397

JSON object : View

Products Affected

No product.

CWE

CWE-266

Incorrect Privilege Assignment

CWE-285

Improper Authorization

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