CVE-2026-9396: Improper Restriction of Rendered UI Layers in Besen BS20 EV Charging Station
CVE-2026-9396 is a medium-severity vulnerability affecting the Besen BS20 EV Charging Station firmware up to version 20260426. It involves improper restriction of rendered UI layers in the Firmware Version Check component, which can be exploited remotely. The attack complexity is high, making exploitation difficult. As of the latest information, Besen has acknowledged the issue and is reviewing it, but no official fix or patch has been released yet. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability in the Besen BS20 EV Charging Station firmware (up to version 20260426) concerns improper restriction of rendered UI layers within the Firmware Version Check component. The flaw allows remote attackers to manipulate the UI rendering in a way that is not properly restricted. The attack requires high complexity and no privileges or user interaction are needed. The vendor has acknowledged the vulnerability and is currently reviewing it, but no remediation or patch has been published.
Potential Impact
The vulnerability could allow a remote attacker to manipulate the user interface rendering of the charging station, potentially leading to unauthorized UI behavior or misleading displays. However, exploitation is considered difficult due to the high attack complexity. There are no reports of active exploitation in the wild, and the impact is limited to the affected firmware versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since Besen is reviewing the issue as of April 2026 and no official fix has been released, users should monitor for vendor updates and apply any forthcoming patches promptly. No other specific mitigations are provided at this time.
CVE-2026-9396: Improper Restriction of Rendered UI Layers in Besen BS20 EV Charging Station
Description
CVE-2026-9396 is a medium-severity vulnerability affecting the Besen BS20 EV Charging Station firmware up to version 20260426. It involves improper restriction of rendered UI layers in the Firmware Version Check component, which can be exploited remotely. The attack complexity is high, making exploitation difficult. As of the latest information, Besen has acknowledged the issue and is reviewing it, but no official fix or patch has been released yet. There are no known exploits in the wild at this time.
CVSS v4.0
Score 6.3medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the Besen BS20 EV Charging Station firmware (up to version 20260426) concerns improper restriction of rendered UI layers within the Firmware Version Check component. The flaw allows remote attackers to manipulate the UI rendering in a way that is not properly restricted. The attack requires high complexity and no privileges or user interaction are needed. The vendor has acknowledged the vulnerability and is currently reviewing it, but no remediation or patch has been published.
Potential Impact
The vulnerability could allow a remote attacker to manipulate the user interface rendering of the charging station, potentially leading to unauthorized UI behavior or misleading displays. However, exploitation is considered difficult due to the high attack complexity. There are no reports of active exploitation in the wild, and the impact is limited to the affected firmware versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since Besen is reviewing the issue as of April 2026 and no official fix has been released, users should monitor for vendor updates and apply any forthcoming patches promptly. No other specific mitigations are provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-24T06:18:58.081Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a136221a5ae1af1aad05181
Added to database: 05/24/2026, 20:40:01 UTC
Last enriched: 06/01/2026, 20:52:36 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 66
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.