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CVE Record

CVE-2021-1937: Reachable assertion is possible while processing peer association WLAN message from host and nonstandard in...

Reachable assertion is possible while processing peer association WLAN message from host and nonstandard incoming packet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-1937 is a Qualcomm Snapdragon WLAN flaw that can trigger an assertion while processing certain peer association or nonstandard packets. The documented impact is loss of availability, not data theft or modification. Because many Snapdragon product families are listed, exposure depends on the exact chipset and OEM firmware used.

Executive priority

Treat this as a high-priority availability risk for fleets that rely on affected Qualcomm WLAN components. The main business concern is service disruption, especially for wireless, IoT, automotive, or infrastructure devices. Patch planning should follow OEM firmware availability and asset criticality.

Technical view

The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating unauthenticated network-reachable denial of service with high availability impact. Qualcomm describes a reachable assertion during WLAN message processing from the host and nonstandard incoming packets across multiple Snapdragon platforms.

Likely exposure

Organizations may be exposed through devices using listed Qualcomm Snapdragon Wi-Fi or networking components, including mobile, IoT, automotive, compute, consumer electronics, voice/music, and wired infrastructure categories. Real exposure must be confirmed through chipset and firmware inventory.

Exploitation context

The provided bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is network reachable and low complexity per CVSS, but the available sources do not provide exploit maturity, public exploit status, or attack details.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, affected Qualcomm product families, and Qualcomm's bulletin reference. The source bundle does not include CWE mapping, proof-of-concept details, specific fixed firmware versions, or confirmed exploitation.

Mitigation direction

  • Review Qualcomm's June 2021 security bulletin for vendor guidance.
  • Obtain firmware or security updates from the device OEM or Qualcomm-supported channel.
  • Prioritize internet-edge, wireless-facing, IoT, automotive, and infrastructure devices using affected chipsets.
  • Track unsupported devices that cannot receive OEM firmware updates.
  • Monitor affected fleets for unexpected WLAN resets, crashes, or availability degradation.

Validation and detection

  • Map deployed devices to Qualcomm chipsets listed for CVE-2021-1937.
  • Compare device firmware levels against Qualcomm and OEM advisory information.
  • Confirm updates were applied through device management or firmware reporting.
  • Check operational logs for WLAN assertion failures, resets, or repeated availability events.
  • Document devices where chipset or firmware status cannot be verified.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-1937 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2021-1937Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Qualcomm, Inc.Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and NetworkingAQT1000, AR8031, AR8035, AR9380, CSR8811, CSRA6620, CSRA6640, CSRB31024, IPQ4018, IPQ4028, IPQ4029, IPQ5010, IPQ5018, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8064, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, PMP8074, QCA1062, QCA1064, QCA2062, QCA2064, QCA2065, QCA2066, QCA4024, QCA6175A, QCA6310, QCA6335, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6428, QCA6430, QCA6431, QCA6436, QCA6438, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8072, QCA8075, QCA8081, QCA8337, QCA9888, QCA9889, QCA9898, QCA9980, QCA9984, QCA9990, QCA9992, QCA9994, QCM6125, QCN5021, QCN5022, QCN5024, QCN5052, QCN5054, QCN5064, QCN5121, QCN5122, QCN5124, QCN5152, QCN5154, QCN5164, QCN5550, QCN6023, QCN6024, QCN9000, QCN9012, QCN9022, QCN9024, QCN9070, QCN9072, QCN9074, QCN9100, QCS405, QCS410, QCS605, QCS610, QCS6125, QSM8350, SA415M, SA515M, SA6145P, SA6150P, SA6155 ...[truncated*]Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.