CVE-2021-35087Network attack vector

Remote service crash via malformed system information message

Published Jun 14, 2022 · Updated Aug 4, 2024

NULL pointer dereference in Qualcomm Snapdragon modems allows remote attackers to crash affected devices via a malformed system information message. The modem message handler inadequately validates a system information message before processing it, allowing a NULL pointer access. No privileges or user interaction are required; the published impact is limited to availability, and the public record does not identify whether the failure crashes or restarts the modem or device.

CVSS severity7.5
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Qualcomm Snapdragon modems allows remote attackers to crash affected devices via a malformed system information message. The modem message handler inadequately validates a system information message before processing it, allowing a NULL pointer access. No privileges or user interaction are required; the published impact is limited to availability, and the public record does not identify whether the failure crashes or restarts the modem or device.

The record

CVE
CVE-2021-35087
Published
Jun 14, 2022
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=AR8035, QCA6390, QCA6391, QCA8081, QCA8337, QCM6490, QCS6490, SD 8 Gen1 5G, SD480, SD690 5G, SD695, SD765, SD765G, SD768G, SD778G, SD780G, SD865 5G, SD870, SD888 5G, SDX55, SDX55M, SDX65, SM7250P, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3988, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=AR8035, QCA6390, QCA6391, QCA8081, QCA8337, QCM6490, QCS6490, SD 8 Gen1 5G, SD480, SD690 5G, SD695, SD765, SD765G, SD768G, SD778G, SD780G, SD865 5G, SD870, SD888 5G, SDX55, SDX55M, SDX65, SM7250P, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3988, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

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
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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