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CVE-2026-9398— Besen BS20 EV Charging Station BLE/WiFi authentication replay

CVSS 3.1 · Low EPSS 0.04% · P13

Possible ATT&CK Techniques 1AI

T1110.004 · Credential Stuffing

Affected Version Matrix 1

VendorProductVersion RangeStatus
BesenBS20 EV Charging Station20260426affected
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I. Basic Information for CVE-2026-9398

Vulnerability Information
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Vulnerability Title
Besen BS20 EV Charging Station BLE/WiFi authentication replay
Source: NVD (National Vulnerability Database)
Vulnerability 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."
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: NVD (National Vulnerability Database)
Vulnerability Title
Besen BS20 EV Charging Station 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Besen BS20 EV Charging Station是中国Besen公司的一款交流电动汽车壁挂式充电桩。 Besen BS20 EV Charging Station 20260426及之前版本存在安全漏洞，该漏洞源于BLE/WiFi组件中未知部分操作不当，可能导致通过捕获重放绕过身份验证，攻击复杂度高。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
BesenBS20 EV Charging Station 20260426 cpe:2.3:a:besen:bs20_ev_charging_station:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9398

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III. Intelligence Information for CVE-2026-9398

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Proof of Concept for CVE-2026-9398 (1)

Same Patch Batch · Besen · 2026-05-24 · 5 CVEs total

CVE-2026-93978.1 HIGHBesen BS20 EV Charging Station OTA Update Installation improper authorization
CVE-2026-93963.7 LOWBesen BS20 EV Charging Station Firmware Version Check ui layer
CVE-2026-93953.5 LOWBesen BS20 EV Charging Station BLE/UDP insufficiently protected credentials
CVE-2026-93943.1 LOWBesen BS20 EV Charging Station Bluetooth Low Energy weak password

IV. Related Vulnerabilities

Same product: BS20 EV Charging Station
Same vendor: Besen
Same weakness: CWE-294

V. Comments for CVE-2026-9398

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