CVE-2026-9397: critical vulnerability in Besen BS20 EV Charging Station
Besen BS20 EV Charging Station OTA Update Installation improper authorization
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.2epss 0.5%
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."
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
Besen · BS20 EV Charging StationRelated CVEs — Besen BS20 EV Charging Station
In the same product, most dangerous first.
CVE-2026-9398LOWBesen BS20 EV Charging Station BLE/WiFi authentication replayEPSS 0.3%CVE-2026-9396MEDIUMBesen BS20 EV Charging Station Firmware Version Check ui layerEPSS 0.3%CVE-2026-9394LOWBesen BS20 EV Charging Station Bluetooth Low Energy weak passwordEPSS 0.2%CVE-2026-9395MEDIUMBesen BS20 EV Charging Station BLE/UDP insufficiently protected credentialsEPSS 0.2%