CVE-2026-9398 json
Besen BS20 EV Charging Station BLE/WiFi authentication replay
published 2026-05-24 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-31550
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
Summary
A security vulnerability has been detected in Besen BS20 EV Charging Station up to 20260426. This affects an unknown part of the component BLE/WiFi. Such manipulation leads to authentication bypass by capture-replay. The attack must be carried out from within the local network. Attacks of this nature are highly complex. It is indicated that the exploitability is 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."
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P |
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R |
| CNA | 3.0 | 3.1 | CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R |
| CNA | 2.0 | 1.8 | AV:A/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR |
| CNA | 4.0 | 1.3 | CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 2.0 | 1.8 | AV:A/AC:H/Au:N/C:N/I:P/A:N |
Affected products
- Besen BS20 EV Charging Station
Classification
References
-
vuldb.com
/vuln/365379
vdb-entry
-
vuldb.com
/vuln/365379/cti
signature, permissions-required
-
vuldb.com
/submit/813577
third-party-advisory
-
github.com
/carfeii/besen#finding-5-unauthorized-tampering-of-charger-commands
related
Sources
- CVE List CVE-2026-9398
- NVD CVE-2026-9398
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