CVE-2021-35117Network attack vector

Information disclosure and service interruption via IBSS beacon

Published Apr 1, 2022 · Updated Aug 4, 2024

Out-of-bounds read in Qualcomm Snapdragon WLAN firmware allows remote attackers to disclose memory or interrupt service via an IBSS beacon. The WLAN beacon-processing path reads beyond a buffer boundary while parsing an IBSS beacon; Qualcomm has not disclosed the affected function or field. A network-reachable attacker needs no privileges or user interaction, and the documented consequence is limited to memory disclosure and service interruption.

CVSS severity8.2
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Qualcomm Snapdragon WLAN firmware allows remote attackers to disclose memory or interrupt service via an IBSS beacon. The WLAN beacon-processing path reads beyond a buffer boundary while parsing an IBSS beacon; Qualcomm has not disclosed the affected function or field. A network-reachable attacker needs no privileges or user interaction, and the documented consequence is limited to memory disclosure and service interruption.

The record

CVE
CVE-2021-35117
Published
Apr 1, 2022
Updated
Aug 4, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 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

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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=APQ8096AU, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, CSRB31024, MSM8996AU, QCA6175A, QCA6390, QCA6391, QCA6426, QCA6436, QCA6554A, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6125, QCS2290, QCS405, QCS410, QCS4290, QCS610, QCS6125, QCX315, QRB5165, QRB5165M, QRB5165N, SA415M, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD660, SD665, SD675, SD678, SD690 5G, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD855, SD865 5G, SD870, SD888, SD888 5G, SDX55, SDX55M, SDX65, SDXR1, SDXR2 5G, SM6225, SM6250, SM6250P, SM7250P, SM7315, SM7325P, WCD9326, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8096AU, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, CSRB31024, MSM8996AU, QCA6175A, QCA6390, QCA6391, QCA6426, QCA6436, QCA6554A, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8081, QCA8337, QCM2290, QCM4290, QCM6125, QCS2290, QCS405, QCS410, QCS4290, QCS610, QCS6125, QCX315, QRB5165, QRB5165M, QRB5165N, SA415M, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD660, SD665, SD675, SD678, SD690 5G, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD855, SD865 5G, SD870, SD888, SD888 5G, SDX55, SDX55M, SDX65, SDXR1, SDXR2 5G, SM6225, SM6250, SM6250P, SM7250P, SM7315, SM7325P, WCD9326, WCD9335, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

9.4NIST NVDAV:N/AC:L/Au:N/C:C/I:N/A:C
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
8.2Qualcomm, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

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-125Out-of-bounds Read

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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