CVE-2021-1929Public exploit

Device identifier disclosure via unprotected QMMI broadcasts

Published Sep 8, 2021 · Updated Aug 3, 2024

Information disclosure in Qualcomm Snapdragon devices allows local users to obtain unique device identifiers through the QMMI app. The preinstalled com.qualcomm.qti.qmmi package accepts an unprotected DIAG_START_TESTCAST broadcast, runs SYSTEM_INFO, and returns IMEI, serial, Wi-Fi MAC, and Bluetooth addresses in an unrestricted implicit broadcast. A zero-permission third-party Android app can reach the flaw when QMMI 4.0 resides under /system/app rather than a privileged-app directory; the demonstrated impact is identifier disclosure only.

CVSS severity6.2
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Qualcomm Snapdragon devices allows local users to obtain unique device identifiers through the QMMI app. The preinstalled com.qualcomm.qti.qmmi package accepts an unprotected DIAG_START_TESTCAST broadcast, runs SYSTEM_INFO, and returns IMEI, serial, Wi-Fi MAC, and Bluetooth addresses in an unrestricted implicit broadcast. A zero-permission third-party Android app can reach the flaw when QMMI 4.0 resides under /system/app rather than a privileged-app directory; the demonstrated impact is identifier disclosure only.

The record

CVE
CVE-2021-1929
Published
Sep 8, 2021
Updated
Aug 3, 2024
Vendor
Qualcomm
Product
Snapdragon
Classifications
T1082
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 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

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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, MSM8996AU, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCM2290, QCM4290, QCM6125, QCS2290, QCS4290, QCS603, QCS605, QCS610, QCS6125, Qualcomm215, SA6145P, SA6150P, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD205, SD210, SD460, SD480, SD662, SD665, SD675, SD678, SD720G, SD730, SD765, SD765G, SD768G, SD778G, SD780G, SD855, SD865 5G, SD870, SD888 5G, SDA429W, SDM830, SDX50M, SDX55, SDX55M, SDXR2 5G, SM6250, SM7250P, SM7315, SM7325P, WCD9326, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Qualcomm · Snapdragonversion=APQ8096AU, AQT1000, MSM8996AU, QCA6390, QCA6391, QCA6420, QCA6421, QCA6426, QCA6430, QCA6431, QCA6436, QCA6564A, QCA6564AU, QCA6574A, QCA6574AU, QCA6595, QCA6595AU, QCA6696, QCM2290, QCM4290, QCM6125, QCS2290, QCS4290, QCS603, QCS605, QCS610, QCS6125, Qualcomm215, SA6145P, SA6150P, SA6155P, SA8145P, SA8150P, SA8155, SA8155P, SA8195P, SD 675, SD205, SD210, SD460, SD480, SD662, SD665, SD675, SD678, SD720G, SD730, SD765, SD765G, SD768G, SD778G, SD780G, SD855, SD865 5G, SD870, SD888 5G, SDA429W, SDM830, SDX50M, SDX55, SDX55M, SDXR2 5G, SM6250, SM7250P, SM7315, SM7325P, WCD9326, WCD9340, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN3610, WCN3615, WCN3620, WCN3660B, WCN3680, WCN3910, WCN3950, WCN3980, WCN3988, WCN3990, WCN3991, WCN3998, WCN6740, WCN6750, WCN6850, WCN6851, WCN6856, WSA8810, WSA8815, WSA8830, WSA8835

Published CVSS scores

6.2Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1082System Information Discovery

Public exploit references

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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