What is CVE-2020-3704?

CVE-2020-3704 is a high-severity vulnerability in Qualcomm Agatti, classified under Improper Locking. CVSS score: 7.5/10. Published 2020-11-02.

How severe is CVE-2020-3704?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-3704 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Qualcomm Agatti

CVE-2020-3704

u'While processing invalid connection request PDU which is nonstandard (interval or timeout is 0) from central device may lead peripheral system enter into dead lock state.(This CVE is equivalent to InvalidConnectionRequest(CVE-2019-19193) mentioned in sweyntooth paper)' in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon Wired Infrastructure and Networking in Agatti, APQ8009, APQ8017, APQ8053, AR9344, Bitra, IPQ5018, Kamorta, MDM9607, MDM9640, MDM9650, MSM8996AU, Nicobar, QCA6174A, QCA6390, QCA6574AU, QCA9377, QCA9886, QCM6125, QCN7605, QCS404, QCS405, QCS605, QCS610, QRB5165, Rennell, SA415M, SA515M, Saipan, SC7180, SC8180X, SDA845, SDM660, SDM670, SDM710, SDM845, SDM850, SDX20, SDX24, SDX55, SM6150, SM7150, SM8150, SM8250, SXR1130, SXR2130

Published 2020-11-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-667 — Improper Locking

Public proof-of-concept exploits

References

www.qualcomm.com/company/product-security/bulletins/october-2020-bulletin (Broken Link)
www.qualcomm.com/company/product-security/bulletins/october-2020-security-bulle… (Vendor Advisory)

Frequently asked questions

What is CVE-2020-3704?: CVE-2020-3704 is a high-severity vulnerability in Qualcomm Agatti, classified under Improper Locking. CVSS score: 7.5/10. Published 2020-11-02.
How severe is CVE-2020-3704?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-3704 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.