How severe is CVE-2021-34149?

CVE-2021-34149 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-2021-34149 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34149?

CVE-2021-34149 affects Ti Cc256xcqfn-em Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34149?

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

When was CVE-2021-34149 published?

CVE-2021-34149 was published on 2021-09-07 and last updated on 2026-06-17.

CVE-2021-34149

CVE-2021-34149 is a medium-severity vulnerability in Ti Cc256xcqfn-em 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: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ti Cc256xcqfn-em Firmware
Published: 2021-09-07
Last modified: 2026-06-17

Description

The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.

Frequently asked questions

What is CVE-2021-34149?: The Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM does not properly handle the reception of continuous LMP_AU_Rand packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device by flooding it with LMP_AU_Rand packets after the paging procedure.
How severe is CVE-2021-34149?: CVE-2021-34149 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-2021-34149 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34149?: CVE-2021-34149 affects Ti Cc256xcqfn-em Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34149?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34149 published?: CVE-2021-34149 was published on 2021-09-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:ti:cc256xcqfn-em_firmware:-:*:*:*:*:*:*:*