CVE-2026-9398: Authentication Bypass by Capture-replay in Besen BS20 EV Charging Station
A security vulnerability has been detected in Besen BS20 EV Charging Station up to 20260426. This affects an unknown part of the component BLE/WiFi. Such manipulation leads to authentication bypass by capture-replay. The attack must be carried out from within the local network. Attacks of this nature are highly complex. It is indicated that the exploitability is 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."
AI Analysis
Technical Summary
This vulnerability affects the Besen BS20 EV Charging Station's BLE/WiFi component, enabling an attacker within the local network to perform a capture-replay attack that bypasses authentication. The attack complexity is high, and no privileges or user interaction are required for exploitation. The CVSS 4.0 base score is 2.3, reflecting low severity due to the attack vector and complexity. The vendor has acknowledged the vulnerability and is reviewing it, but no official fix or patch has been published to date.
Potential Impact
Successful exploitation allows an attacker on the local network to bypass authentication mechanisms of the charging station, potentially enabling unauthorized access or control. However, the attack is highly complex and requires local network access, limiting the practical risk. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor is reviewing the issue and no official fix is available, users should restrict local network access to trusted parties and monitor for vendor updates. No specific mitigations have been provided by the vendor yet.
CVE-2026-9398: Authentication Bypass by Capture-replay in Besen BS20 EV Charging Station
Description
A security vulnerability has been detected in Besen BS20 EV Charging Station up to 20260426. This affects an unknown part of the component BLE/WiFi. Such manipulation leads to authentication bypass by capture-replay. The attack must be carried out from within the local network. Attacks of this nature are highly complex. It is indicated that the exploitability is 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 v4.0
Score 2.3low
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Besen BS20 EV Charging Station's BLE/WiFi component, enabling an attacker within the local network to perform a capture-replay attack that bypasses authentication. The attack complexity is high, and no privileges or user interaction are required for exploitation. The CVSS 4.0 base score is 2.3, reflecting low severity due to the attack vector and complexity. The vendor has acknowledged the vulnerability and is reviewing it, but no official fix or patch has been published to date.
Potential Impact
Successful exploitation allows an attacker on the local network to bypass authentication mechanisms of the charging station, potentially enabling unauthorized access or control. However, the attack is highly complex and requires local network access, limiting the practical risk. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor is reviewing the issue and no official fix is available, users should restrict local network access to trusted parties and monitor for vendor updates. No specific mitigations have been provided by the vendor yet.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T06:19:03.634Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1365a6a5ae1af1aad23dc7
Added to database: 05/24/2026, 20:55:02 UTC
Last enriched: 06/01/2026, 20:14:47 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 86
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