CVE-2021-34144

MEDIUM

6.5

CVSS Score

Published: September 7, 2021 at 05:55 AM UTC

Updated: June 17, 2026 at 03:55 AM UTC

15 products affected across 1 vendorFw AC63 Bt SDKAc6966Ac6965

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

Description

The Bluetooth Classic implementation in the Zhuhai Jieli AC6366C BT SDK through 0.9.1 does not properly handle the reception of truncated LMP_SCO_Link_Request 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fw AC63 Bt SDK · Zh Jieli

95%

v ≤ 0.9.1

zh-jieli-ac6936 (environment) · zh-jieli-ac6951 (environment) · zh-jieli-ac6952 (environment) · zh-jieli-ac6954 (environment) · zh-jieli-ac6955 (environment) · zh-jieli-ac6956 (environment) · zh-jieli-ac6963 (environment) · zh-jieli-ac6965 (environment) · zh-jieli-ac6966 (environment) · zh-jieli-ac6969 (environment) · zh-jieli-ac6973 (environment) · zh-jieli-ac6976 (environment) · zh-jieli-ac6983 (environment) · zh-jieli-ac6986 (environment)

Ac6936 · Zh Jielidevice

80%

All versions

Ac6951 · Zh Jielidevice

80%

All versions

Ac6952 · Zh Jielidevice

80%

All versions

Ac6954 · Zh Jielidevice

80%

All versions