CVE-2021-30310 [High] | Input Validation Bypass in Apq8009 Firmware

Possible buffer overflow due to Improper validation of received CF-ACK and CF-Poll data frames in Snapdragon Auto, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Mobile, Snapdragon Voice & Music

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.28%	0.58%	+0.30%
2	2025-03-17	0.08%	0.28%	+0.20%
3	2023-03-07	—	0.08%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.28%

0.58%

+0.30%

2025-03-17

0.08%

0.28%

+0.20%

2023-03-07

—

0.08%

—

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]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` 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:P) Partial availability impact.	10.0	2.9	[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]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P 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:P): Partial availability impact.

10.0

2.9

[email protected]

Affected software / configurations for CVE-2021-30310

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	apq8053_firmware	—	cpe:2.3:o:qualcomm:apq8053_firmware:-:::::::*
qualcomm	apq8096au_firmware	—	cpe:2.3:o:qualcomm:apq8096au_firmware:-:::::::*
qualcomm	csrb31024_firmware	—	cpe:2.3:o:qualcomm:csrb31024_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	mdm9626_firmware	—	cpe:2.3:o:qualcomm:mdm9626_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	mdm9655_firmware	—	cpe:2.3:o:qualcomm:mdm9655_firmware:-:::::::*
qualcomm	msm8996au_firmware	—	cpe:2.3:o:qualcomm:msm8996au_firmware:-:::::::*
qualcomm	qca4020_firmware	—	cpe:2.3:o:qualcomm:qca4020_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	qca6310_firmware	—	cpe:2.3:o:qualcomm:qca6310_firmware:-:::::::*
qualcomm	qca6320_firmware	—	cpe:2.3:o:qualcomm:qca6320_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	qca6584au_firmware	—	cpe:2.3:o:qualcomm:qca6584au_firmware:-:::::::*
qualcomm	qca6595_firmware	—	cpe:2.3:o:qualcomm:qca6595_firmware:-:::::::*
qualcomm	qca6595au_firmware	—	cpe:2.3:o:qualcomm:qca6595au_firmware:-:::::::*
qualcomm	qca6696_firmware	—	cpe:2.3:o:qualcomm:qca6696_firmware:-:::::::*
qualcomm	qca9367_firmware	—	cpe:2.3:o:qualcomm:qca9367_firmware:-:::::::*
qualcomm	qca9369_firmware	—	cpe:2.3:o:qualcomm:qca9369_firmware:-:::::::*
qualcomm	qca9377_firmware	—	cpe:2.3:o:qualcomm:qca9377_firmware:-:::::::*
qualcomm	qca9379_firmware	—	cpe:2.3:o:qualcomm:qca9379_firmware:-:::::::*
qualcomm	qca9886_firmware	—	cpe:2.3:o:qualcomm:qca9886_firmware:-:::::::*
qualcomm	qcm2290_firmware	—	cpe:2.3:o:qualcomm:qcm2290_firmware:-:::::::*
qualcomm	qcs2290_firmware	—	cpe:2.3:o:qualcomm:qcs2290_firmware:-:::::::*
qualcomm	sa515m_firmware	—	cpe:2.3:o:qualcomm:sa515m_firmware:-:::::::*
qualcomm	sa6145p_firmware	—	cpe:2.3:o:qualcomm:sa6145p_firmware:-:::::::*
qualcomm	sa6150p_firmware	—	cpe:2.3:o:qualcomm:sa6150p_firmware:-:::::::*
qualcomm	sa6155_firmware	—	cpe:2.3:o:qualcomm:sa6155_firmware:-:::::::*
qualcomm	sa6155p_firmware	—	cpe:2.3:o:qualcomm:sa6155p_firmware:-:::::::*
qualcomm	sa8145p_firmware	—	cpe:2.3:o:qualcomm:sa8145p_firmware:-:::::::*
qualcomm	sa8150p_firmware	—	cpe:2.3:o:qualcomm:sa8150p_firmware:-:::::::*
qualcomm	sa8155_firmware	—	cpe:2.3:o:qualcomm:sa8155_firmware:-:::::::*
qualcomm	sa8155p_firmware	—	cpe:2.3:o:qualcomm:sa8155p_firmware:-:::::::*
qualcomm	sa8195p_firmware	—	cpe:2.3:o:qualcomm:sa8195p_firmware:-:::::::*
qualcomm	sd210_firmware	—	cpe:2.3:o:qualcomm:sd210_firmware:-:::::::*
qualcomm	sd480_firmware	—	cpe:2.3:o:qualcomm:sd480_firmware:-:::::::*
qualcomm	sd690_5g_firmware	—	cpe:2.3:o:qualcomm:sd690_5g_firmware:-:::::::*
qualcomm	sd750g_firmware	—	cpe:2.3:o:qualcomm:sd750g_firmware:-:::::::*
qualcomm	sd765_firmware	—	cpe:2.3:o:qualcomm:sd765_firmware:-:::::::*
qualcomm	sd765g_firmware	—	cpe:2.3:o:qualcomm:sd765g_firmware:-:::::::*
qualcomm	sd768g_firmware	—	cpe:2.3:o:qualcomm:sd768g_firmware:-:::::::*
qualcomm	sd820_firmware	—	cpe:2.3:o:qualcomm:sd820_firmware:-:::::::*
qualcomm	sd821_firmware	—	cpe:2.3:o:qualcomm:sd821_firmware:-:::::::*
qualcomm	sd845_firmware	—	cpe:2.3:o:qualcomm:sd845_firmware:-:::::::*
qualcomm	sdx20_firmware	—	cpe:2.3:o:qualcomm:sdx20_firmware:-:::::::*
qualcomm	sdx20m_firmware	—	cpe:2.3:o:qualcomm:sdx20m_firmware:-:::::::*
qualcomm	sdx24_firmware	—	cpe:2.3:o:qualcomm:sdx24_firmware:-:::::::*
qualcomm	sdx55_firmware	—	cpe:2.3:o:qualcomm:sdx55_firmware:-:::::::*
qualcomm	sm7250_firmware	—	cpe:2.3:o:qualcomm:sm7250_firmware:-:::::::*
qualcomm	wcd9326_firmware	—	cpe:2.3:o:qualcomm:wcd9326_firmware:-:::::::*
qualcomm	wcd9330_firmware	—	cpe:2.3:o:qualcomm:wcd9330_firmware:-:::::::*
qualcomm	wcd9335_firmware	—	cpe:2.3:o:qualcomm:wcd9335_firmware:-:::::::*
qualcomm	wcd9340_firmware	—	cpe:2.3:o:qualcomm:wcd9340_firmware:-:::::::*
qualcomm	wcd9341_firmware	—	cpe:2.3:o:qualcomm:wcd9341_firmware:-:::::::*
qualcomm	wcd9360_firmware	—	cpe:2.3:o:qualcomm:wcd9360_firmware:-:::::::*
qualcomm	wcd9370_firmware	—	cpe:2.3:o:qualcomm:wcd9370_firmware:-:::::::*
qualcomm	wcd9375_firmware	—	cpe:2.3:o:qualcomm:wcd9375_firmware:-:::::::*
qualcomm	wcd9380_firmware	—	cpe:2.3:o:qualcomm:wcd9380_firmware:-:::::::*
qualcomm	wcd9385_firmware	—	cpe:2.3:o:qualcomm:wcd9385_firmware:-:::::::*
qualcomm	wcn3610_firmware	—	cpe:2.3:o:qualcomm:wcn3610_firmware:-:::::::*
qualcomm	wcn3615_firmware	—	cpe:2.3:o:qualcomm:wcn3615_firmware:-:::::::*
qualcomm	wcn3660b_firmware	—	cpe:2.3:o:qualcomm:wcn3660b_firmware:-:::::::*
qualcomm	wcn3680b_firmware	—	cpe:2.3:o:qualcomm:wcn3680b_firmware:-:::::::*
qualcomm	wcn3910_firmware	—	cpe:2.3:o:qualcomm:wcn3910_firmware:-:::::::*
qualcomm	wcn3950_firmware	—	cpe:2.3:o:qualcomm:wcn3950_firmware:-:::::::*
qualcomm	wcn3988_firmware	—	cpe:2.3:o:qualcomm:wcn3988_firmware:-:::::::*
qualcomm	wcn3990_firmware	—	cpe:2.3:o:qualcomm:wcn3990_firmware:-:::::::*

References for CVE-2021-30310

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/october-2021-bulletin	Vendor Advisory

URL

CVE-2021-30310

Exploit prediction scoring system (EPSS) score for CVE-2021-30310

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30310

Weakness enumeration for CVE-2021-30310

Affected software / configurations for CVE-2021-30310

References for CVE-2021-30310