CVE-2021-1909 [High] | Memory Corruption in Apq8009 Firmware

Buffer overflow occurs in trusted applications due to lack of length check of parameters in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	0.06%	0.03%	-0.03%
2	2025-03-29	0.04%	0.06%	+0.02%
3	2023-03-07	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

0.06%

0.03%

-0.03%

2025-03-29

0.04%

0.06%

+0.02%

2023-03-07

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.3	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L` 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: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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.5	4.7	[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]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.3

3.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L 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: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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.5

4.7

[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]

Affected software / configurations for CVE-2021-1909

Vendor	Product	Version	Raw CPE
qualcomm	apq8009_firmware	—	cpe:2.3:o:qualcomm:apq8009_firmware:-:::::::*
qualcomm	apq8009w_firmware	—	cpe:2.3:o:qualcomm:apq8009w_firmware:-:::::::*
qualcomm	apq8016_firmware	—	cpe:2.3:o:qualcomm:apq8016_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	apq8037_firmware	—	cpe:2.3:o:qualcomm:apq8037_firmware:-:::::::*
qualcomm	apq8052_firmware	—	cpe:2.3:o:qualcomm:apq8052_firmware:-:::::::*
qualcomm	apq8053_firmware	—	cpe:2.3:o:qualcomm:apq8053_firmware:-:::::::*
qualcomm	apq8056_firmware	—	cpe:2.3:o:qualcomm:apq8056_firmware:-:::::::*
qualcomm	apq8062_firmware	—	cpe:2.3:o:qualcomm:apq8062_firmware:-:::::::*
qualcomm	apq8064_firmware	—	cpe:2.3:o:qualcomm:apq8064_firmware:-:::::::*
qualcomm	apq8064au_firmware	—	cpe:2.3:o:qualcomm:apq8064au_firmware:-:::::::*
qualcomm	apq8076_firmware	—	cpe:2.3:o:qualcomm:apq8076_firmware:-:::::::*
qualcomm	apq8084_firmware	—	cpe:2.3:o:qualcomm:apq8084_firmware:-:::::::*
qualcomm	apq8096au_firmware	—	cpe:2.3:o:qualcomm:apq8096au_firmware:-:::::::*
qualcomm	aqt1000_firmware	—	cpe:2.3:o:qualcomm:aqt1000_firmware:-:::::::*
qualcomm	ar3012_firmware	—	cpe:2.3:o:qualcomm:ar3012_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	ar9580_firmware	—	cpe:2.3:o:qualcomm:ar9580_firmware:-:::::::*
qualcomm	csr6030_firmware	—	cpe:2.3:o:qualcomm:csr6030_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	fsm10055_firmware	—	cpe:2.3:o:qualcomm:fsm10055_firmware:-:::::::*
qualcomm	fsm10056_firmware	—	cpe:2.3:o:qualcomm:fsm10056_firmware:-:::::::*
qualcomm	fsm9900_firmware	—	cpe:2.3:o:qualcomm:fsm9900_firmware:-:::::::*
qualcomm	fsm9905_firmware	—	cpe:2.3:o:qualcomm:fsm9905_firmware:-:::::::*
qualcomm	fsm9910_firmware	—	cpe:2.3:o:qualcomm:fsm9910_firmware:-:::::::*
qualcomm	fsm9915_firmware	—	cpe:2.3:o:qualcomm:fsm9915_firmware:-:::::::*
qualcomm	fsm9916_firmware	—	cpe:2.3:o:qualcomm:fsm9916_firmware:-:::::::*
qualcomm	fsm9950_firmware	—	cpe:2.3:o:qualcomm:fsm9950_firmware:-:::::::*
qualcomm	fsm9955_firmware	—	cpe:2.3:o:qualcomm:fsm9955_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	ipq8062_firmware	—	cpe:2.3:o:qualcomm:ipq8062_firmware:-:::::::*
qualcomm	ipq8064_firmware	—	cpe:2.3:o:qualcomm:ipq8064_firmware:-:::::::*
qualcomm	ipq8065_firmware	—	cpe:2.3:o:qualcomm:ipq8065_firmware:-:::::::*
qualcomm	ipq8066_firmware	—	cpe:2.3:o:qualcomm:ipq8066_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	mdm8207_firmware	—	cpe:2.3:o:qualcomm:mdm8207_firmware:-:::::::*
qualcomm	mdm8635m_firmware	—	cpe:2.3:o:qualcomm:mdm8635m_firmware:-:::::::*
qualcomm	mdm9150_firmware	—	cpe:2.3:o:qualcomm:mdm9150_firmware:-:::::::*
qualcomm	mdm9205_firmware	—	cpe:2.3:o:qualcomm:mdm9205_firmware:-:::::::*
qualcomm	mdm9206_firmware	—	cpe:2.3:o:qualcomm:mdm9206_firmware:-:::::::*
qualcomm	mdm9207_firmware	—	cpe:2.3:o:qualcomm:mdm9207_firmware:-:::::::*
qualcomm	mdm9225_firmware	—	cpe:2.3:o:qualcomm:mdm9225_firmware:-:::::::*
qualcomm	mdm9225m_firmware	—	cpe:2.3:o:qualcomm:mdm9225m_firmware:-:::::::*
qualcomm	mdm9230_firmware	—	cpe:2.3:o:qualcomm:mdm9230_firmware:-:::::::*
qualcomm	mdm9235m_firmware	—	cpe:2.3:o:qualcomm:mdm9235m_firmware:-:::::::*
qualcomm	mdm9250_firmware	—	cpe:2.3:o:qualcomm:mdm9250_firmware:-:::::::*
qualcomm	mdm9330_firmware	—	cpe:2.3:o:qualcomm:mdm9330_firmware:-:::::::*
qualcomm	mdm9607_firmware	—	cpe:2.3:o:qualcomm:mdm9607_firmware:-:::::::*

References for CVE-2021-1909

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

URL

CVE-2021-1909

Exploit prediction scoring system (EPSS) score for CVE-2021-1909

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1909

Weakness enumeration for CVE-2021-1909

Affected software / configurations for CVE-2021-1909

References for CVE-2021-1909