CVE-2021-30303

Possible buffer overflow due to lack of buffer length check when segmented WMI command is received in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking

Published: 2022-01-03 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30303 is rated Low Risk (33.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.16%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-30303

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 0.16% +0.12%
2 2025-05-12 0.07% 0.03% -0.03%
3 2025-03-17 — 0.07% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30303

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-30303

Affected software / configurations for CVE-2021-30303

Vendor Product Version Raw CPE
qualcomm apq8009_firmware — cpe:2.3:o:qualcomm:apq8009_firmware:-:*:*:*:*:*:*:*
qualcomm apq8017_firmware — cpe:2.3:o:qualcomm:apq8017_firmware:-:*:*:*:*:*:*:*
qualcomm apq8064au_firmware — cpe:2.3:o:qualcomm:apq8064au_firmware:-:*:*:*:*:*:*:*
qualcomm apq8096au_firmware — cpe:2.3:o:qualcomm:apq8096au_firmware:-:*:*:*:*:*:*:*
qualcomm aqt1000_firmware — cpe:2.3:o:qualcomm:aqt1000_firmware:-:*:*:*:*:*:*:*
qualcomm ar7420_firmware — cpe:2.3:o:qualcomm:ar7420_firmware:-:*:*:*:*:*:*:*
qualcomm ar8031_firmware — cpe:2.3:o:qualcomm:ar8031_firmware:-:*:*:*:*:*:*:*
qualcomm ar8035_firmware — cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
qualcomm ar9380_firmware — cpe:2.3:o:qualcomm:ar9380_firmware:-:*:*:*:*:*:*:*
qualcomm csr8811_firmware — cpe:2.3:o:qualcomm:csr8811_firmware:-:*:*:*:*:*:*:*
qualcomm csra6620_firmware — cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
qualcomm csra6640_firmware — cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
qualcomm csrb31024_firmware — cpe:2.3:o:qualcomm:csrb31024_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4018_firmware — cpe:2.3:o:qualcomm:ipq4018_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4019_firmware — cpe:2.3:o:qualcomm:ipq4019_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4028_firmware — cpe:2.3:o:qualcomm:ipq4028_firmware:-:*:*:*:*:*:*:*
qualcomm ipq4029_firmware — cpe:2.3:o:qualcomm:ipq4029_firmware:-:*:*:*:*:*:*:*
qualcomm ipq5010_firmware — cpe:2.3:o:qualcomm:ipq5010_firmware:-:*:*:*:*:*:*:*
qualcomm ipq5018_firmware — cpe:2.3:o:qualcomm:ipq5018_firmware:-:*:*:*:*:*:*:*
qualcomm ipq5028_firmware — cpe:2.3:o:qualcomm:ipq5028_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6000_firmware — cpe:2.3:o:qualcomm:ipq6000_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6005_firmware — cpe:2.3:o:qualcomm:ipq6005_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6010_firmware — cpe:2.3:o:qualcomm:ipq6010_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6018_firmware — cpe:2.3:o:qualcomm:ipq6018_firmware:-:*:*:*:*:*:*:*
qualcomm ipq6028_firmware — cpe:2.3:o:qualcomm:ipq6028_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8064_firmware — cpe:2.3:o:qualcomm:ipq8064_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8065_firmware — cpe:2.3:o:qualcomm:ipq8065_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8068_firmware — cpe:2.3:o:qualcomm:ipq8068_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8069_firmware — cpe:2.3:o:qualcomm:ipq8069_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8070_firmware — cpe:2.3:o:qualcomm:ipq8070_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8070a_firmware — cpe:2.3:o:qualcomm:ipq8070a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8071_firmware — cpe:2.3:o:qualcomm:ipq8071_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8071a_firmware — cpe:2.3:o:qualcomm:ipq8071a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8072_firmware — cpe:2.3:o:qualcomm:ipq8072_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8072a_firmware — cpe:2.3:o:qualcomm:ipq8072a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8074_firmware — cpe:2.3:o:qualcomm:ipq8074_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8074a_firmware — cpe:2.3:o:qualcomm:ipq8074a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8076_firmware — cpe:2.3:o:qualcomm:ipq8076_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8076a_firmware — cpe:2.3:o:qualcomm:ipq8076a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8078_firmware — cpe:2.3:o:qualcomm:ipq8078_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8078a_firmware — cpe:2.3:o:qualcomm:ipq8078a_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8173_firmware — cpe:2.3:o:qualcomm:ipq8173_firmware:-:*:*:*:*:*:*:*
qualcomm ipq8174_firmware — cpe:2.3:o:qualcomm:ipq8174_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9206_firmware — cpe:2.3:o:qualcomm:mdm9206_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9250_firmware — cpe:2.3:o:qualcomm:mdm9250_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9607_firmware — cpe:2.3:o:qualcomm:mdm9607_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9628_firmware — cpe:2.3:o:qualcomm:mdm9628_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9640_firmware — cpe:2.3:o:qualcomm:mdm9640_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9650_firmware — cpe:2.3:o:qualcomm:mdm9650_firmware:-:*:*:*:*:*:*:*
qualcomm msm8996au_firmware — cpe:2.3:o:qualcomm:msm8996au_firmware:-:*:*:*:*:*:*:*
qualcomm pmp8074_firmware — cpe:2.3:o:qualcomm:pmp8074_firmware:-:*:*:*:*:*:*:*
qualcomm qca1023_firmware — cpe:2.3:o:qualcomm:qca1023_firmware:-:*:*:*:*:*:*:*
qualcomm qca2062_firmware — cpe:2.3:o:qualcomm:qca2062_firmware:-:*:*:*:*:*:*:*
qualcomm qca2064_firmware — cpe:2.3:o:qualcomm:qca2064_firmware:-:*:*:*:*:*:*:*
qualcomm qca2065_firmware — cpe:2.3:o:qualcomm:qca2065_firmware:-:*:*:*:*:*:*:*
qualcomm qca2066_firmware — cpe:2.3:o:qualcomm:qca2066_firmware:-:*:*:*:*:*:*:*
qualcomm qca4024_firmware — cpe:2.3:o:qualcomm:qca4024_firmware:-:*:*:*:*:*:*:*
qualcomm qca4531_firmware — cpe:2.3:o:qualcomm:qca4531_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174a_firmware — cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6175a_firmware — cpe:2.3:o:qualcomm:qca6175a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6320_firmware — cpe:2.3:o:qualcomm:qca6320_firmware:-:*:*:*:*:*:*:*
qualcomm qca6390_firmware — cpe:2.3:o:qualcomm:qca6390_firmware:-:*:*:*:*:*:*:*
qualcomm qca6391_firmware — cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
qualcomm qca6420_firmware — cpe:2.3:o:qualcomm:qca6420_firmware:-:*:*:*:*:*:*:*
qualcomm qca6426_firmware — cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
qualcomm qca6428_firmware — cpe:2.3:o:qualcomm:qca6428_firmware:-:*:*:*:*:*:*:*
qualcomm qca6430_firmware — cpe:2.3:o:qualcomm:qca6430_firmware:-:*:*:*:*:*:*:*
qualcomm qca6436_firmware — cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
qualcomm qca6438_firmware — cpe:2.3:o:qualcomm:qca6438_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564_firmware — cpe:2.3:o:qualcomm:qca6564_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564a_firmware — cpe:2.3:o:qualcomm:qca6564a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564au_firmware — cpe:2.3:o:qualcomm:qca6564au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574_firmware — cpe:2.3:o:qualcomm:qca6574_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574a_firmware — cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574au_firmware — cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6584_firmware — cpe:2.3:o:qualcomm:qca6584_firmware:-:*:*:*:*:*:*:*
qualcomm qca6584au_firmware — cpe:2.3:o:qualcomm:qca6584au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595au_firmware — cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6696_firmware — cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
qualcomm qca7500_firmware — cpe:2.3:o:qualcomm:qca7500_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-30303

cvelogic Threat Intelligence