CVE-2026-9397 Besen BS20 EV Charging Station OTA Update Installation improper authorization
Remote attackers can bypass authorization in the OTA update handler to install malicious firmware on Besen BS20 EV charging stations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9397?
CVE-2026-9397 is a critical missing authorization vulnerability in Besen BS20 EV Charging Station, published on 24 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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."
Which versions are affected by CVE-2026-9397?
How do I fix CVE-2026-9397?
No fix has been published for CVE-2026-9397 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9397 being exploited?
There is no known exploitation of CVE-2026-9397 in the wild and no public exploit code.
Sources
Also known as GHSA-2468-xgpc-jvv7.