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CVE Vulnerability Details :
CVE-2026-9397
PUBLISHED
More InfoOfficial Page
Assigner-VulDB
Assigner Org ID-1af790b2-7ee1-4545-860a-a788eba489b5
View Known Exploited Vulnerability (KEV) details
Published At-24 May, 2026 | 20:30
Updated At-26 May, 2026 | 14:37
Rejected At-
▼CVE Numbering Authority (CNA)
Besen BS20 EV Charging Station OTA Update Installation improper authorization

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."

Affected Products
Vendor
Besen
Product
BS20 EV Charging Station
CPEs
  • cpe:2.3:a:besen:bs20_ev_charging_station:*:*:*:*:*:*:*:*
Modules
  • OTA Update Installation Handler
Versions
Affected
  • 20260426
Problem Types
TypeCWE IDDescription
CWECWE-285Improper Authorization
CWECWE-266Incorrect Privilege Assignment
Type: CWE
CWE ID: CWE-285
Description: Improper Authorization
Type: CWE
CWE ID: CWE-266
Description: Incorrect Privilege Assignment
Metrics
VersionBase scoreBase severityVector
4.09.2CRITICAL
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
3.18.1HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
3.08.1HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
2.07.6N/A
AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Version: 4.0
Base score: 9.2
Base severity: CRITICAL
Vector:
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
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Version: 3.0
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Version: 2.0
Base score: 7.6
Base severity: N/A
Vector:
AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
carfeii (VulDB User)
coordinator
VulDB CNA Team
Timeline
EventDate
Advisory disclosed2026-05-24 00:00:00
VulDB entry created2026-05-24 02:00:00
VulDB entry last update2026-05-24 08:24:17
Event: Advisory disclosed
Date: 2026-05-24 00:00:00
Event: VulDB entry created
Date: 2026-05-24 02:00:00
Event: VulDB entry last update
Date: 2026-05-24 08:24:17
Replaced By
Rejected Reason
References
HyperlinkResource
https://vuldb.com/vuln/365378
vdb-entry
https://vuldb.com/vuln/365378/cti
signature
permissions-required
https://vuldb.com/submit/813576
third-party-advisory
https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates
patch
Hyperlink: https://vuldb.com/vuln/365378
Resource:
vdb-entry
Hyperlink: https://vuldb.com/vuln/365378/cti
Resource:
signature
permissions-required
Hyperlink: https://vuldb.com/submit/813576
Resource:
third-party-advisory
Hyperlink: https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found