HOMEVULNERABILITIESCVE-2021-31610
MEDIUM

CVE-2021-31610

NVD-CWE-noinfoPublished: September 7, 2021· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

The Bluetooth Classic implementation on AB32VG1 devices does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (either restart or deadlock the device) by flooding a device with LMP_AU_rand data.

NVD Source

Technical Analysis

CVE-2021-31610 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

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 availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

bluetrum4 product(s)
ab5376t firmwareab5376tbt8896a firmwarebt8896a
mi2 product(s)
mi true wireless earbuds basic 2 firmwaremi true wireless earbuds basic 2
Source: NVD CPE · 6 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

ADVISORYhttp://www.bluetrum.com/product/ab5376t.html
ADVISORYhttp://www.bluetrum.com/product/bt8896a.html
ADVISORYhttp://www.bluetrum.com/product/ab5376t.html
ADVISORYhttp://www.bluetrum.com/product/bt8896a.html

All References (8)

→
http://www.bluetrum.com/product/ab5376t.htmlProduct · Vendor Advisory
→
http://www.bluetrum.com/product/bt8896a.htmlProduct · Vendor Advisory
→
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
→
https://www.mi.com/global/mi-true-wireless-earbuds-basic-2/Not Applicable
→
http://www.bluetrum.com/product/ab5376t.htmlProduct · Vendor Advisory
→
http://www.bluetrum.com/product/bt8896a.htmlProduct · Vendor Advisory
→
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
→
https://www.mi.com/global/mi-true-wireless-earbuds-basic-2/Not Applicable

Quick Facts

CVE IDCVE-2021-31610
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected2 vendor(s)
PublishedSep 7, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2017-10405
10.0
CVE-2017-10137
10.0
CVE-2017-3324
10.0
CVE-2017-10402
10.0
CVE-2017-10912
10.0
CVE-2017-10151
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-31610 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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