CVE-2021-1896

Adjacent packet disclosure via weak WLAN configuration

Published Jul 13, 2021 · Updated Aug 3, 2024

Cleartext transmission in Qualcomm Snapdragon Compute and Snapdragon Connectivity allows adjacent attackers to read another client's WLAN packets. The WLAN component uses an undisclosed weak configuration that forwards unencrypted packets between clients rather than maintaining traffic isolation. The attacker must share the wireless network segment; published impact is limited to packet confidentiality, with no integrity or availability effect.

CVSS severity4.3
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Qualcomm Snapdragon Compute and Snapdragon Connectivity allows adjacent attackers to read another client's WLAN packets. The WLAN component uses an undisclosed weak configuration that forwards unencrypted packets between clients rather than maintaining traffic isolation. The attacker must share the wireless network segment; published impact is limited to packet confidentiality, with no integrity or availability effect.

The record

CVE
CVE-2021-1896
Published
Jul 13, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-319, T1040
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3NIST National Vulnerability DatabaseAV:A/AC:L/Au:N/C:P/I:N/A:N
4.3Qualcomm, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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