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CVE-2026-9396— Besen BS20 EV Charging Station Firmware Version Check ui layer

Quick assessment

Affected
Besen BS20 EV Charging Station
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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及之前版本存在安全漏洞，该漏洞源于Firmware Version Check组件中未知功能操作不当，可能导致渲染的UI层限制不当，攻击复杂度高。

CVSS 3.7 · Low EPSS 0.40% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
Besen BS20 EV Charging Station 20260426 affected
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I. Basic Information for CVE-2026-9396

Vulnerability Information
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Vulnerability Title
Besen BS20 EV Charging Station Firmware Version Check ui layer
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Besen BS20 EV Charging Station up to 20260426. Affected by this vulnerability is an unknown functionality of the component Firmware Version Check. The manipulation results in improper restriction of rendered ui layers. The attack can be executed remotely. A high complexity level is associated with this attack. The exploitation appears 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:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不当限制渲染UI层或帧
Source: CVE Program / CVE List V5
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Firmware Version Check组件中未知功能操作不当，可能导致渲染的UI层限制不当，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-2026-9396

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III. Intelligence Information for CVE-2026-9396

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Other References for CVE-2026-9396 (1)

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

CVE-2026-9397 8.1 HIGH Besen BS20 EV Charging Station OTA Update Installation improper authorization
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-1021

V. Comments for CVE-2026-9396

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