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CVE-2026-9397— Besen BS20 EV Charging Station OTA Update Installation improper authorization

CVSS 8.1 · High EPSS 0.56% · P42

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
BesenBS20 EV Charging Station20260426affected
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I. Basic Information for CVE-2026-9397

Vulnerability Information
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Vulnerability Title
Besen BS20 EV Charging Station OTA Update Installation improper authorization
Source: NVD (National Vulnerability Database)
Vulnerability 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."
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Besen BS20 EV Charging Station 授权问题漏洞
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及之前版本存在授权问题漏洞，该漏洞源于OTA Update Installation Handler组件中未知功能操作不当，可能导致不当授权，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-2026-9397

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 11889 chars
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III. Intelligence Information for CVE-2026-9397

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Proof of Concept for CVE-2026-9397 (1)

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

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
CVE-2026-93983.1 LOWBesen BS20 EV Charging Station BLE/WiFi authentication replay

IV. Related Vulnerabilities

Same product: BS20 EV Charging Station
Same vendor: Besen
Same weakness: CWE-285

V. Comments for CVE-2026-9397

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