CVE-2026-9397 Details
Description
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."
A vulnerability has been identified in the Besen BS20 EV Charging Station, affecting versions prior to 20260426. The issue lies in the OTA Update Installation Handler, where improper authorization allows for unauthorized manipulation of firmware updates. This vulnerability can be exploited remotely, although it requires a high level of complexity and is known to be difficult to exploit.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 24, 2026CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates | [email protected] | BundleExploitTechnical Description |
| https://vuldb.com/submit/813576 | [email protected] | Permission Required |
| https://vuldb.com/vuln/365378 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/365378/cti | [email protected] | AdvisoryPermission Required |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-266 | Incorrect Privilege Assignment | [email protected] |
| CWE-285 | Improper Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Besen BS20 EV Charging Station | <= 20260426 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 24, 2026 | New CVE Received | [email protected] |