Vulnerability · Published Mar 23, 2026 · Assigned by VulDB

CVE-2026-4583Shenzhen HCC Technology MPOS M6 PLUS Bluetooth authentication replay

Medium 5.0

In plain English

A medium-severity improper authentication in MPOS M6 PLUS from Shenzhen HCC Technology. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.3%top 76.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Shenzhen HCC Technology	MPOS M6 PLUS	1V.31-N

Weakness: CWE-294, CWE-287 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-352420 | Shenzhen HCC Technology MPOS M6 PLUS Bluetooth authentication replay vdb-entry
VDB-352420 | CTI Indicators (IOB, IOC, TTP) signature, permissions-required
Submit #775434 | Shenzhen HCC Technology Co., Ltd M6PLUS MPOS M6PLUS-FW-1V.31-N Missing Anti-Replay Protection third-party-advisory
https://github.com/Davim09/m6plusexploit/blob/main/docs/CVE-2-Replay.md exploit