TI-2026-03987 Aliases CVE-2026-4583 GHSA-mh2m-j5hq-vv2j

Shenzhen HCC Technology MPOS M6 PLUS Bluetooth authentication replay

MEDIUM 45CWE-287Published 2026-03-23 · Updated 2026-03-25

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: High
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00303 23rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Shenzhen HCC Technology	MPOS M6 PLUS	1V.31-N	—	No fix listed	CNA

MPOS M6 PLUS VendorShenzhen HCC Technology Affected 1V.31-N Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-4583
2026-10-03 Alias added: GHSA-mh2m-j5hq-vv2j

References

Exploit 1

https://github.com/Davim09/m6plusexploit/blob/main/docs/CVE-2-Replay.md

TI-2026-71038 Rendered UI layer flaw in Shenzhen HCC MPOS M6 PLUS QR code display CVSS 4.0MEDIUM 5.1
TI-2026-03988 Shenzhen HCC Technology MPOS M6 PLUS Cardholder Data cleartext transmission CVSS 4.0LOW 2.3
TI-2026-03986 Shenzhen HCC Technology MPOS M6 PLUS Bluetooth missing authentication CVSS 4.0LOW 2.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences