CVE-2026-4583 Shenzhen HCC Technology MPOS M6 PLUS Bluetooth authentication replay
Attackers on the local network can bypass Bluetooth authentication via replay attacks on Shenzhen HCC MPOS M6 PLUS terminals.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4583?
CVE-2026-4583 is a low-severity authentication bypass vulnerability in Shenzhen HCC Technology MPOS M6 PLUS, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was detected in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N. Affected by this issue is some unknown functionality of the component Bluetooth Handler. Performing a manipulation results in authentication bypass by capture-replay. The attack must originate from the local network. The attack is considered to have high complexity. The exploitation is known to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4583?
How do I fix CVE-2026-4583?
No fix has been published for CVE-2026-4583 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-4583 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4583 exists.
Sources
Also known as GHSA-mh2m-j5hq-vv2j.