CVE-2021-1957

Improper Access Control when ACL link encryption is failed and ACL link is not disconnected...

6.5 MediumFix available

Improper Access Control when ACL link encryption is failed and ACL link is not disconnected during reconnection with paired device in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.15%Down 0.3 points since Sep 9, 2021

What each source reports

CVE List Score used 6.5

Record: CVE-2021-1957
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

EUVDEUVD-2021-7421 6.5

Record: EUVD-2021-7421
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-8pqm-hrrp-373j No score

Improper Access Control when ACL link encryption is failed and ACL link is not disconnected...

Record: GHSA-8pqm-hrrp-373j
Updated: 2026-11-02

NVD 6.5

Record: CVE-2021-1957
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 3.3 LowAV:A/AC:L/Au:N/C:N/I:N/A:P
Updated: 2026-11-02

Affected products

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Affected packages

Affected packages
Package	Affected	Fixed
`platform/system/bt` Android	SoCVersion:0 up to SoCVersion:2021-09-05, plus listed versions SoCVersion	SoCVersion:2021-09-05
`platform/vendor/qcom-opensource/system/bt` Android	SoCVersion:0 up to SoCVersion:2021-09-05, plus listed versions SoCVersion	SoCVersion:2021-09-05

History

History
Recorded	Changed	Sources
Nov 3, 2026	facts	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-1957 is a medium vulnerability (CVSS 6.5) in Qualcomm, Inc. Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Industrial Iot, Snapdragon Mobile, Snapdragon Voice & Music, published September 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. Fixed in platform/system/bt SoCVersion:2021-09-05.