How severe is CVE-2020-3634?

CVE-2020-3634 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2020-3634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3634?

CVE-2020-3634 primarily affects Qualcomm Apq8053 Firmware. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-3634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-3634 published?

CVE-2020-3634 was published on 2020-09-09 and last updated on 2026-06-17.

CVE-2020-3634

CVE-2020-3634 is a critical-severity vulnerability in Qualcomm Apq8053 Firmware with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-191.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 9.4
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-191
Affected product: Qualcomm Apq8053 Firmware
Published: 2020-09-09
Last modified: 2026-06-17

Description

u'Multiple Read overflows issue due to improper length check while decoding Generic NAS transport/EMM info' in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables in APQ8053, APQ8096AU, APQ8098, Kamorta, MDM9150, MDM9205, MDM9206, MDM9607, MDM9625, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8905, MSM8909W, MSM8917, MSM8953, MSM8996AU, MSM8998, Nicobar, QCM2150, QCS605, QCS610, QM215, Rennell, SA415M, Saipan, SC7180, SDA660, SDA845, SDM429, SDM429W, SDM439, SDM450, SDM630, SDM632, SDM636, SDM660, SDM670, SDM710, SDM845, SDM850, SDX20, SDX24, SDX55, SM6150, SM7150, SM8150, SXR1130

Frequently asked questions

What is CVE-2020-3634?: u'Multiple Read overflows issue due to improper length check while decoding Generic NAS transport/EMM info' in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wearables in APQ8053, APQ8096AU, APQ8098, Kamorta, MDM9150, MDM9205, MDM9206, MDM9607, MDM9625, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8905, MSM8909W, MSM8917, MSM8953, MSM8996AU, MSM8998, Nicobar, QCM2150, QCS605, QCS610, QM215, Rennell, SA415M, Saipan, SC7180, SDA660, SDA845, SDM429, SDM429W, SDM439, SDM450, SDM630, SDM632, SDM636, SDM660, SDM670, SDM710, SDM845, SDM850, SDX20, SDX24, SDX55, SM6150, SM7150, SM8150, SXR1130
How severe is CVE-2020-3634?: CVE-2020-3634 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2020-3634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3634?: CVE-2020-3634 primarily affects Qualcomm Apq8053 Firmware. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-3634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-3634 published?: CVE-2020-3634 was published on 2020-09-09 and last updated on 2026-06-17.

References

https://www.qualcomm.com/company/product-security/bulletins/september-2020-bulletin

Affected products (50)

cpe:2.3:o:qualcomm:apq8053_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8096au_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:apq8098_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:kamorta_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9205_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9206_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9607_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9625_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9635m_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9640_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9645_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9650_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:mdm9655_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8905_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8909w_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8917_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8953_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8996au_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:msm8998_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:nicobar_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcm2150_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcs605_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcs610_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qm215_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:rennell_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sa415m_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:saipan_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sc7180_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sda660_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sda845_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm429_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm429w_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm439_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm450_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm630_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm632_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm636_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm660_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sdm670_firmware:-:*:*:*:*:*:*:*

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