Vulnerability-Lookup

FKIE_CVE-2021-34146

Vulnerability from fkie_nvd - Published: 2021-09-07 07:15 - Updated: 2026-06-17 03:55

Severity

6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

The Bluetooth Classic implementation in the Cypress CYW920735Q60EVB does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service and restart (crash) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.

References

URL	Tags
cve@mitre.org	https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	Technical Description, Third Party Advisory
cve@mitre.org	https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://dl.packetstormsecurity.net/papers/general/braktooth.pdf	Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices	Vendor Advisory

Impacted products

Vendor	Product	Version
cypress	cyw920735q60evb-01_firmware	-
cypress	cyw920735q60evb-01	-
cypress	cyw20735b1_firmware	-
cypress	cyw20735b1	-

JSON

To clipboard

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  "id": "CVE-2021-34146",
  "lastModified": "2026-06-17T03:55:30.750",
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}

CVE-2021-34146 (GCVE-0-2021-34146)

Vulnerability from cvelistv5 – Published: 2021-09-07 06:18 – Updated: 2024-08-04 00:05

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://www.cypress.com/documentation/datasheets/…	x_refsource_MISC
https://dl.packetstormsecurity.net/papers/general…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.