CVE-2020-3704 [High] | Security Vulnerability in Agatti Firmware

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

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.19%	0.53%	+0.34%
2	2025-03-17	0.09%	0.19%	+0.10%
3	2023-03-07	—	0.09%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.19%

0.53%

+0.34%

2025-03-17

0.09%

0.19%

+0.10%

2023-03-07

—

0.09%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) No account or special rights needed—anonymous or random user is enough. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
7.8	2.0	HIGH	`AV:N/AC:L/Au:N/C:N/I:N/A:C` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:C) Complete availability impact.	10.0	6.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): No account or special rights needed—anonymous or random user is enough.
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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

7.8

2.0

HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:C): Complete availability impact.

10.0

6.9

[email protected]

Affected software / configurations for CVE-2020-3704

Vendor	Product	Version	Raw CPE
qualcomm	agatti_firmware	—	cpe:2.3:o:qualcomm:agatti_firmware:-:::::::*
qualcomm	apq8009_firmware	—	cpe:2.3:o:qualcomm:apq8009_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	apq8053_firmware	—	cpe:2.3:o:qualcomm:apq8053_firmware:-:::::::*
qualcomm	ar9344_firmware	—	cpe:2.3:o:qualcomm:ar9344_firmware:-:::::::*
qualcomm	bitra_firmware	—	cpe:2.3:o:qualcomm:bitra_firmware:-:::::::*
qualcomm	ipq5018_firmware	—	cpe:2.3:o:qualcomm:ipq5018_firmware:-:::::::*
qualcomm	kamorta_firmware	—	cpe:2.3:o:qualcomm:kamorta_firmware:-:::::::*
qualcomm	mdm9607_firmware	—	cpe:2.3:o:qualcomm:mdm9607_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	nicobar_firmware	—	cpe:2.3:o:qualcomm:nicobar_firmware:-:::::::*
qualcomm	qca6174a_firmware	—	cpe:2.3:o:qualcomm:qca6174a_firmware:-:::::::*
qualcomm	qca6390_firmware	—	cpe:2.3:o:qualcomm:qca6390_firmware:-:::::::*
qualcomm	qca6574au_firmware	—	cpe:2.3:o:qualcomm:qca6574au_firmware:-:::::::*
qualcomm	qca9377_firmware	—	cpe:2.3:o:qualcomm:qca9377_firmware:-:::::::*
qualcomm	qca9886_firmware	—	cpe:2.3:o:qualcomm:qca9886_firmware:-:::::::*
qualcomm	qcm6125_firmware	—	cpe:2.3:o:qualcomm:qcm6125_firmware:-:::::::*
qualcomm	qcn7605_firmware	—	cpe:2.3:o:qualcomm:qcn7605_firmware:-:::::::*
qualcomm	qcs404_firmware	—	cpe:2.3:o:qualcomm:qcs404_firmware:-:::::::*
qualcomm	qcs405_firmware	—	cpe:2.3:o:qualcomm:qcs405_firmware:-:::::::*
qualcomm	qcs605_firmware	—	cpe:2.3:o:qualcomm:qcs605_firmware:-:::::::*
qualcomm	qcs610_firmware	—	cpe:2.3:o:qualcomm:qcs610_firmware:-:::::::*
qualcomm	qrb5165_firmware	—	cpe:2.3:o:qualcomm:qrb5165_firmware:-:::::::*
qualcomm	rennell_firmware	—	cpe:2.3:o:qualcomm:rennell_firmware:-:::::::*
qualcomm	sa415m_firmware	—	cpe:2.3:o:qualcomm:sa415m_firmware:-:::::::*
qualcomm	sa515m_firmware	—	cpe:2.3:o:qualcomm:sa515m_firmware:-:::::::*
qualcomm	saipan_firmware	—	cpe:2.3:o:qualcomm:saipan_firmware:-:::::::*
qualcomm	sc7180_firmware	—	cpe:2.3:o:qualcomm:sc7180_firmware:-:::::::*
qualcomm	sc8180x_firmware	—	cpe:2.3:o:qualcomm:sc8180x_firmware:-:::::::*
qualcomm	sda845_firmware	—	cpe:2.3:o:qualcomm:sda845_firmware:-:::::::*
qualcomm	sdm660_firmware	—	cpe:2.3:o:qualcomm:sdm660_firmware:-:::::::*
qualcomm	sdm670_firmware	—	cpe:2.3:o:qualcomm:sdm670_firmware:-:::::::*
qualcomm	sdm710_firmware	—	cpe:2.3:o:qualcomm:sdm710_firmware:-:::::::*
qualcomm	sdm845_firmware	—	cpe:2.3:o:qualcomm:sdm845_firmware:-:::::::*
qualcomm	sdm850_firmware	—	cpe:2.3:o:qualcomm:sdm850_firmware:-:::::::*
qualcomm	sdx20_firmware	—	cpe:2.3:o:qualcomm:sdx20_firmware:-:::::::*
qualcomm	sdx24_firmware	—	cpe:2.3:o:qualcomm:sdx24_firmware:-:::::::*
qualcomm	sdx55_firmware	—	cpe:2.3:o:qualcomm:sdx55_firmware:-:::::::*
qualcomm	sm6150_firmware	—	cpe:2.3:o:qualcomm:sm6150_firmware:-:::::::*
qualcomm	sm7150_firmware	—	cpe:2.3:o:qualcomm:sm7150_firmware:-:::::::*
qualcomm	sm8150_firmware	—	cpe:2.3:o:qualcomm:sm8150_firmware:-:::::::*
qualcomm	sm8250_firmware	—	cpe:2.3:o:qualcomm:sm8250_firmware:-:::::::*
qualcomm	sxr1130_firmware	—	cpe:2.3:o:qualcomm:sxr1130_firmware:-:::::::*
qualcomm	sxr2130_firmware	—	cpe:2.3:o:qualcomm:sxr2130_firmware:-:::::::*

References for CVE-2020-3704

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/october-2020-bulletin	Broken Link
https://www.qualcomm.com/company/product-security/bulletins/october-2020-security-bulletin	Vendor Advisory

URL

CVE-2020-3704

Exploit prediction scoring system (EPSS) score for CVE-2020-3704

Common vulnerability scoring system (CVSS) metrics for CVE-2020-3704

Weakness enumeration for CVE-2020-3704

Affected software / configurations for CVE-2020-3704

References for CVE-2020-3704