CVE-2021-1970Network attack vector

Memory disclosure via unchecked FT sub-element lengths

Published Jul 13, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Qualcomm Snapdragon WLAN firmware allows remote attackers to read memory via malformed FT sub-elements. The qcacld-3.0 WLAN parser processes Fast Transition information sub-elements without first validating each declared length against the remaining frame data. An unauthenticated attacker within Wi-Fi reach can supply the malformed management data; the published impact is memory disclosure only, with no integrity or availability effect.

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

Out-of-bounds read in Qualcomm Snapdragon WLAN firmware allows remote attackers to read memory via malformed FT sub-elements. The qcacld-3.0 WLAN parser processes Fast Transition information sub-elements without first validating each declared length against the remaining frame data. An unauthenticated attacker within Wi-Fi reach can supply the malformed management data; the published impact is memory disclosure only, with no integrity or availability effect.

The record

CVE
CVE-2021-1970
Published
Jul 13, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-125, CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=APQ8053, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, CSRB31024, MSM8953, QCA6175A, QCA6310, QCA6320, QCA6335, QCA6390, QCA6391, QCA6420, QCA6426, QCA6430, QCA6436, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM2290, QCM4290, QCM6125, QCS2290, QCS405, QCS4290, QCS610, QCS6125, SA415M, SA515M, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 636, SD 675, SD 8C, SD 8CX, SD460, SD480, SD660, SD662, SD665, SD670, SD675, SD678, SD690 5G, SD710, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD835, SD845, SD855, SD865 5G, SD870, SD888, SD888 5G, SDM630, SDX50M, SDX55, SDX55M, SDXR1, SDXR2 5G, SM4125, SM6250, SM6250P, SM7250P, SM7315, SM7325P, WCD9326, WCD9335, WCD9340, WCD9341, WCD9370, WCD9371, WCD9375, WCD9380, WCD9385, WCN3615, WCN3680B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, WCN6740, WCN6750, WCN6850, WCN6851, WCN6855, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8053, AQT1000, AR8031, AR8035, CSRA6620, CSRA6640, CSRB31024, MSM8953, QCA6175A, QCA6310, QCA6320, QCA6335, QCA6390, QCA6391, QCA6420, QCA6426, QCA6430, QCA6436, QCA6564, QCA6564A, QCA6564AU, QCA6574, QCA6574A, QCA6574AU, QCA6584AU, QCA6595, QCA6595AU, QCA6696, QCA8337, QCM2290, QCM4290, QCM6125, QCS2290, QCS405, QCS4290, QCS610, QCS6125, SA415M, SA515M, SA6145P, SA6150P, SA6155, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 636, SD 675, SD 8C, SD 8CX, SD460, SD480, SD660, SD662, SD665, SD670, SD675, SD678, SD690 5G, SD710, SD720G, SD730, SD750G, SD765, SD765G, SD768G, SD778G, SD780G, SD835, SD845, SD855, SD865 5G, SD870, SD888, SD888 5G, SDM630, SDX50M, SDX55, SDX55M, SDXR1, SDXR2 5G, SM4125, SM6250, SM6250P, SM7250P, SM7315, SM7325P, WCD9326, WCD9335, WCD9340, WCD9341, WCD9370, WCD9371, WCD9375, WCD9380, WCD9385, WCN3615, WCN3680B, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN3999, 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:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
CWE-20Improper Input Validation

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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