HOMEVULNERABILITIESCVE-2019-20470
HIGH

CVE-2019-20470

CWE-1188Published: February 1, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

An issue was discovered on TK-Star Q90 Junior GPS horloge 3.1042.9.8656 devices. It performs actions based on certain SMS commands. This can be used to set up a voice communication channel from the watch to any telephone number, initiated by sending a specific SMS and using the default password, e.g., pw,<password>,call,<mobile_number> triggers an outbound call from the watch. The password is sometimes available because of CVE-2019-20471.

NVD Source

Technical Analysis

CVE-2019-20470 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

tk-star2 product(s)
q90 junior gps horloge firmwareq90 junior gps horloge
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.eurofins-cybersecurity.com/news/connected-devices-smart-watches/
ADVISORYhttps://www.tk-star.com
ADVISORYhttps://www.eurofins-cybersecurity.com/news/connected-devices-smart-watches/
ADVISORYhttps://www.tk-star.com

All References (6)

→
http://seclists.org/fulldisclosure/2024/Jul/14
→
https://www.eurofins-cybersecurity.com/news/connected-devices-smart-watches/Third Party Advisory
→
https://www.tk-star.comVendor Advisory
→
http://seclists.org/fulldisclosure/2024/Jul/14
→
https://www.eurofins-cybersecurity.com/news/connected-devices-smart-watches/Third Party Advisory
→
https://www.tk-star.comVendor Advisory

Quick Facts

CVE IDCVE-2019-20470
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-1188
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 1, 2021

Related CVEs (CWE-1188)

CVE-2025-41672
10.0
CVE-2017-7964
10.0
CVE-2026-31957
10.0
CVE-2024-2912
10.0
CVE-2017-5178
9.8
CVE-2017-8218
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-20470 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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