The Bluetooth Classic implementation in the Cypress CYW920735Q60EVB does not properly…
Priority LOW 30Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.00586 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cypress:cyw920735q60evb-01_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cypress |
| cpe:2.3:h:cypress:cyw920735q60evb-01:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cypress |
| cpe:2.3:o:cypress:cyw20735b1_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cypress |
| cpe:2.3:h:cypress:cyw20735b1:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cypress |
- cpe:2.3:o:cypress:cyw920735q60evb-01_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cypress
- cpe:2.3:h:cypress:cyw920735q60evb-01:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cypress
- cpe:2.3:o:cypress:cyw20735b1_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cypress
- cpe:2.3:h:cypress:cyw20735b1:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cypress
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34146
- 2026-10-03 Alias added: GHSA-jg54-6p86-rp5q
References
Sources
- CVE-2021-34146 · CVE Program
- CVE-2021-34146 · NVD
- FIRST EPSS
- GHSA-jg54-6p86-rp5q · GitHub Advisory Database · CC BY 4.0
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