CVE-2021-31786 json
The Bluetooth Classic Audio implementation on Actions ATS2815 and ATS2819 devices does not properly handle a connection attempt from a host…
published 2021-09-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18667
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
The Bluetooth Classic Audio implementation on Actions ATS2815 and ATS2819 devices does not properly handle a connection attempt from a host with the same BDAddress as the current connected BT host, allowing attackers to trigger a disconnection and deadlock of the device by connecting with a forged BDAddress that matches the original connected host.
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 6.1 | AV:A/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-667 Improper Locking
References
-
actions-semi.com
/index.php?id=3581&siteId=4
broken-link, vendor-advisory
-
launchstudio.bluetooth.com
/ListingDetails/76427
third-party-advisory
-
dl.packetstormsecurity.net
/papers/general/braktooth.pdf
technical-description, third-party-advisory
Sources
- CVE List CVE-2021-31786
- NVD CVE-2021-31786
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