CVE-2019-20473

Unauthorized SIM use via enforced PIN removal

Published Feb 1, 2021 · Updated Aug 5, 2024

Improper access control in TK-Star Q90 Junior GPS Horloge 3.1042.9.8656 allows physically proximate attackers to use a stolen SIM card. The smartwatch rejects any SIM with PIN protection, displays “Remove PIN and restart!”, and remains unusable until the PIN is disabled. Physical possession of the watch is required, after which the removed SIM lacks its normal PIN barrier against unauthorized use.

CVSS severity6.8
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in TK-Star Q90 Junior GPS Horloge 3.1042.9.8656 allows physically proximate attackers to use a stolen SIM card. The smartwatch rejects any SIM with PIN protection, displays “Remove PIN and restart!”, and remains unusable until the PIN is disabled. Physical possession of the watch is required, after which the removed SIM lacks its normal PIN barrier against unauthorized use.

The record

CVE
CVE-2019-20473
Published
Feb 1, 2021
Updated
Aug 5, 2024
Vendor
TK-Star
Product
Q90 Junior GPS Horloge
Classifications
CWE-284
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=3.1042.9.8656

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

TK-Star · Q90 Junior GPS Horlogeversion=3.1042.9.8656

Published CVSS scores

6.8CISA ADP VulnrichmentCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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