Quick answers
- Is CVE-2026-9397 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-9397 being exploited in the wild.
- How severe is CVE-2026-9397?
- High severity, with a CVSS score of 8.1, published 24 May 2026.
- Which products and versions are affected?
- Besen BS20 EV Charging Station up to 20260426.
- Is there a fix for CVE-2026-9397?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-9397 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-9397?
- Check whether you run Besen BS20 EV Charging Station at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The Besen BS20 EV Charging Station's OTA Update Installation Handler fails to properly validate the authenticity and integrity of firmware updates. While some validation checks exist, they are insufficient to prevent an attacker from spoofing the update server and delivering malicious firmware. The attack is carried out remotely over the network but requires a high degree of complexity to successfully bypass existing safeguards. Successful exploitation allows for full device compromise and the ability to manipulate charging parameters. As of the disclosure, the vendor was reviewing the findings.
Affected products
- Besen BS20 EV Charging Station up to 20260426
Timeline
- 2026-04-26: disclosed: Vulnerabilities reported to vendor and acknowledged for review.
- 2026-05-24: advisory: Public disclosure of the vulnerability.