CVE-2026-9396
Besen BS20 EV Charging Station Firmware Version Check ui layer
- State
- Published
- Severity
- 6.3 Medium
- Published
- May 24, 2026
- Updated
- May 26, 2026
- Reserved
- May 24, 2026
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."
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R | VulDB |
| 3.0 | 3.7 Low | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R | VulDB |
| 2.0 | 2.6 Low | AV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-1021 Improper Restriction of Rendered UI Layers
Affected Products
| Product | Versions |
|---|---|
BS20 EV Charging StationBesen |
|
References
- VDB-365377 | Besen BS20 EV Charging Station Firmware Version Check ui layervdb-entry
- VDB-365377 | CTI Indicators (IOB, IOC)signaturepermissions-required
- Submit #813575 | Besen EV Charging Station BS20 EV Charger Improper Verification of Cryptographic Signaturethird-party-advisory
- https://github.com/carfeii/besen#finding-3-firmware-version-check-manipulation-and-ui-spoofingrelated
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