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

Quick assessment

Affected
Besen BS20 EV Charging Station
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 8.1 · High EPSS 0.45% · P38

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Besen BS20 EV Charging Station 20260426 affected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Besen BS20 EV Charging Station 20260426 cpe:2.3:a:besen:bs20_ev_charging_station:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9397

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 11889 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

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-2026-9396 3.7 LOW Besen BS20 EV Charging Station Firmware Version Check ui layer
CVE-2026-9395 3.5 LOW Besen BS20 EV Charging Station BLE/UDP insufficiently protected credentials
CVE-2026-9394 3.1 LOW Besen BS20 EV Charging Station Bluetooth Low Energy weak password
CVE-2026-9398 3.1 LOW Besen 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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