CVE-2026-9397

HIGH EPSS 36.2%
Published May 24, 20261mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published May 24, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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."

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
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/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
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
36.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-266
CWE-285

References 4

  • github.com https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates
  • vuldb.com https://vuldb.com/submit/813576
  • vuldb.com https://vuldb.com/vuln/365378
  • vuldb.com https://vuldb.com/vuln/365378/cti

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.