CVE-2024-21453Network attack vector

Transient service interruption via oversized message decoding

Published Apr 1, 2024 · Updated Aug 1, 2024

Improper input validation in Qualcomm Snapdragon firmware allows remote attackers to interrupt service with an oversized message. The proprietary decoder processes a message larger than available system memory instead of rejecting it before decoding. No authentication or user interaction is required, and the resulting denial of service is transient rather than unrecoverable.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Qualcomm Snapdragon firmware allows remote attackers to interrupt service with an oversized message. The proprietary decoder processes a message larger than available system memory instead of rejecting it before decoding. No authentication or user interaction is required, and the resulting denial of service is transient rather than unrecoverable.

The record

CVE
CVE-2024-21453
Published
Apr 1, 2024
Updated
Aug 1, 2024
Vendor
Qualcomm
Product
QCS610 Firmware
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · QCS610 Firmwareversion=0
Qualcomm · Snapdragon Auto 5G Modem-RF Firmwareversion=0
Qualcomm · WSA8810 Firmwareversion=0
Qualcomm · QCS410 Firmwareversion=0
Qualcomm · Qualcomm Snapdragon Auto 4G Modem Firmwareversion=0
Qualcomm · Qualcomm WCN3980 Firmwareversion=0
Qualcomm · Snapdragonversion=C-V2X 9150; version=QCS410; version=QCS610; version=Qualcomm Video Collaboration VC1 Platform; version=Qualcomm Video Collaboration VC3 Platform; version=Snapdragon Auto 4G Modem; version=Snapdragon Auto 5G Modem-RF; version=WCD9341; version=WCD9370; version=WCN3950; version=WCN3980; version=WSA8810; version=WSA8815
Qualcomm · Qualcomm Video Collaboration VC1 Platform Firmwareversion=0
Qualcomm · WCD9370 Firmwareversion=0
Qualcomm · Qualcomm WCD9341 Firmwareversion=0
Qualcomm · C-V2X 9150 Firmwareversion=0
Qualcomm · WCN3950 Firmwareversion=0
Qualcomm · Qualcomm Video Collaboration VC3 Platform Firmwareversion=0
Qualcomm · WSA8815 Firmwareversion=0

Published CVSS scores

7.5Qualcomm, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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