How severe is CVE-2021-34150?

CVE-2021-34150 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-34150 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34150?

CVE-2021-34150 affects Bluetrum Ab5301a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34150?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-34150 published?

CVE-2021-34150 was published on 2021-09-07 and last updated on 2026-06-17.

CVE-2021-34150

CVE-2021-34150 is a medium-severity vulnerability in Bluetrum Ab5301a Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Bluetrum Ab5301a Firmware
Published: 2021-09-07
Last modified: 2026-06-17

Description

The Bluetooth Classic implementation on Bluetrum AB5301A devices with unknown firmware versions does not properly handle the reception of oversized DM1 LMP packets while no other BT connections are active, allowing attackers in radio range to prevent new BT connections (disabling the AB5301A inquiry and page scan procedures) via a crafted LMP packet. The user needs to manually perform a power cycle (restart) of the device to restore BT connectivity.

Frequently asked questions

What is CVE-2021-34150?: The Bluetooth Classic implementation on Bluetrum AB5301A devices with unknown firmware versions does not properly handle the reception of oversized DM1 LMP packets while no other BT connections are active, allowing attackers in radio range to prevent new BT connections (disabling the AB5301A inquiry and page scan procedures) via a crafted LMP packet. The user needs to manually perform a power cycle (restart) of the device to restore BT connectivity.
How severe is CVE-2021-34150?: CVE-2021-34150 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-34150 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34150?: CVE-2021-34150 affects Bluetrum Ab5301a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34150?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34150 published?: CVE-2021-34150 was published on 2021-09-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:bluetrum:ab5301a_firmware:-:*:*:*:*:*:*:*