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NVD / CVE Program· CNA qualcomm

CVE-2021-1896: Weak configuration in WLAN could cause forwarding of unencrypted packets from one client to another in Snapdragon Compute, Snapdragon Connec

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Weak configuration in WLAN could cause forwarding of unencrypted packets from one client to another in Snapdragon Compute, Snapdragon Connectivity

MediumCVSS 4.3 · v3.1—No exploit No fix recorded
Published
Jul 13, 2021
Updated
Jun 16, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
4.3
CNA · qualcomm
4.3
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-1896

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
qualcommaqt1000 firmware
qualcommaqt1000
qualcommqca6164 firmware
qualcommqca6164
qualcommqca6174 firmware
qualcommqca6174
qualcommqca6174a firmware
qualcommqca6174a
qualcommqca6420 firmware
qualcommqca6420
qualcommqca6430 firmware
qualcommqca6430

and 32 more

Check your site's encryption

This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • qualcomm aqt1000 firmwareall versions
  • qualcomm qca6164 firmwareall versions
  • qualcomm qca6174 firmwareall versions
  • qualcomm qca6174a firmwareall versions
  • qualcomm qca6420 firmwareall versions
  • qualcomm qca6430 firmwareall versions
  • qualcomm qca9377 firmwareall versions
  • qualcomm sc8180x firmwareall versions
  • qualcomm sd 8c firmwareall versions
  • qualcomm sd 8cx firmwareall versions
  • qualcomm sd7c firmwareall versions
  • qualcomm sd850 firmwareall versions
  • qualcomm sdx55 firmwareall versions
  • qualcomm sm6250 firmwareall versions
  • qualcomm wcd9340 firmwareall versions
  • qualcomm wcd9341 firmwareall versions
  • qualcomm wcn3990 firmwareall versions
  • qualcomm wcn3991 firmwareall versions
  • qualcomm wcn3998 firmwareall versions
  • qualcomm wcn6850 firmwareall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (qualcomm). Independent of NVD's CPE analysis and usually ahead of it.

  • Qualcomm, Inc. Snapdragon Compute, Snapdragon Connectivity

    • AQT1000, QCA6164, QCA6174, QCA6174A, QCA6420, QCA6430, QCA9377, SC8180X+SDX55, SD 8C, SD 8CX, SD7c, SD850, SM6250, WCD9340, WCD9341, WCN3990, WCN3991, WCN3998, WCN6850, WSA8810, WSA8815affected

Same product

qualcomm: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-21479Incorrect Authorization in GraphicsKEV
    64This week
  • CVE-2025-21480Incorrect Authorization in Graphics WindowsKEV
    64This week
  • CVE-2021-1965Possible buffer overflow due to lack of parameter length check during MBSSID scan IE parse in Snapdragon Auto, Snapdragon Compute, Snapdrago
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-11306Jun 9, 2021 · Possible integer overflow in RPMB counter due to lack of length check on user provided data in Snapdragon Auto, Snapdragon Compute, Snapdrag
    31Monitor
  • ← EarlierCVE-2021-1937Jun 9, 2021 · Reachable assertion is possible while processing peer association WLAN message from host and nonstandard incoming packet in Snapdragon Auto,
    30Monitor
  • Later →CVE-2021-1931Jul 13, 2021 · Possible buffer overflow due to improper validation of buffer length while processing fast boot commands in Snapdragon Auto, Snapdragon Comp
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-319 · Cleartext Transmission of Sensitive Information

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records