Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N Bluetooth authentication replay

Summaryinfo

A vulnerability described as critical has been identified in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N. This affects an unknown part of the component Bluetooth Handler. Executing a manipulation can lead to authentication replay. This vulnerability is registered as CVE-2026-4583. The attack requires access to the local network. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N. It has been declared as critical. This vulnerability affects an unknown code block of the component Bluetooth Handler. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-4583. The exploitation appears to be difficult. Access to the local network is required for this attack. No form of authentication is required for a successful exploitation. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/23/2026). The MITRE ATT&CK project declares the attack technique as T1040.

It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14399). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Shenzhen HCC Technology

Name

• MPOS M6 PLUS

Version

• 1V.31-N

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CPE 2.2info

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Accepted

• Submit #775434: Shenzhen HCC Technology Co., Ltd M6PLUS MPOS M6PLUS-FW-1V.31-N Missing Anti-Replay Protection (by davimo)

Once again VulDB remains the best source for vulnerability data.

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