CVE-2026-4583Public exploit

Unauthorized transactions via replayed Bluetooth commands

Published Mar 23, 2026 · Updated Mar 23, 2026

Authentication bypass in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N allows physically proximate attackers to submit unauthorized transactions. The Bluetooth handler accepts captured commands repeatedly because it does not validate tag 1F03 against its real-time clock or enforce a nonce, sequence counter, session identifier, or command deduplication. Bluetooth access and a previously captured legitimate command are required; each replay is processed as a new transaction, permitting repeated unauthorized charges.

CVSS severity5.0
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Shenzhen HCC Technology MPOS M6 PLUS 1V.31-N allows physically proximate attackers to submit unauthorized transactions. The Bluetooth handler accepts captured commands repeatedly because it does not validate tag 1F03 against its real-time clock or enforce a nonce, sequence counter, session identifier, or command deduplication. Bluetooth access and a previously captured legitimate command are required; each replay is processed as a new transaction, permitting repeated unauthorized charges.

The record

CVE
CVE-2026-4583
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
Shenzhen HCC Technology Co., Ltd.
Product
MPOS M6 PLUS
Classifications
CWE-294, CWE-287, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1V.31-N

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen HCC Technology Co., Ltd. · MPOS M6 PLUSversion=1V.31-N

Published CVSS scores

5.0VulDBCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
1.3VulDBCVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBAV:A/AC:H/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CWE-287Improper Authentication
T1040Network Sniffing

Public exploit references

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Technologies

Your stack

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Your stack

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