6.5

CVE-2021-34146: cypress cyw20735b1_firmware

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-34146DEBIAN-CVE-2021-34146
Published 07-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-34146 is a medium (CVSS 6.5) vulnerability in cypress cyw20735b1_firmware. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

0.00 pp

From 0.58% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.58%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Cypress2 products
Debian1 product
  • bluez-firmware< 1.2-8
Ubuntu1 product
  • bluez-firmwareAll versions (No fix recorded)

3 vendors · 4 products

References

6 links