CVE-2021-1924 [Critical] | Information Disclosure in Apq8009 Firmware

Information disclosure through timing and power side-channels during mod exponentiation for RSA-CRT 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	2026-06-15	0.04%	0.17%	+0.12%
2	2025-04-04	0.12%	0.04%	-0.08%
3	2025-03-30	—	0.12%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.04%

0.17%

+0.12%

2025-04-04

0.12%

0.04%

-0.08%

2025-03-30

—

0.12%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.0	3.1	CRITICAL	`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N` 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:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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:N) Service keeps running; no real outage angle.	2.5	5.8	[email protected]
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N` 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:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.	1.8	3.6	[email protected]
2.1	2.0	LOW	`AV:L/AC:L/Au:N/C:P/I:N/A:N` 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:P) Partial confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:N) No availability impact.	3.9	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.0

3.1

CRITICAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N 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:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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:N): Service keeps running; no real outage angle.

2.5

5.8

[email protected]

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N 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:N): Data isn’t meaningfully altered or forged.
Availability (A:N): Service keeps running; no real outage angle.

1.8

3.6

[email protected]

2.1

2.0

LOW

AV:L/AC:L/Au:N/C:P/I:N/A:N 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:P): Partial confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:N): No availability impact.

3.9

2.9

[email protected]

Affected software / configurations for CVE-2021-1924

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	apq8056_firmware	—	cpe:2.3:o:qualcomm:apq8056_firmware:-:::::::*
qualcomm	apq8062_firmware	—	cpe:2.3:o:qualcomm:apq8062_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	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:-:::::::*
qualcomm	mdm9625_firmware	—	cpe:2.3:o:qualcomm:mdm9625_firmware:-:::::::*
qualcomm	mdm9625m_firmware	—	cpe:2.3:o:qualcomm:mdm9625m_firmware:-:::::::*
qualcomm	mdm9626_firmware	—	cpe:2.3:o:qualcomm:mdm9626_firmware:-:::::::*

References for CVE-2021-1924

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

URL

CVE-2021-1924

Exploit prediction scoring system (EPSS) score for CVE-2021-1924

Common vulnerability scoring system (CVSS) metrics for CVE-2021-1924

Weakness enumeration for CVE-2021-1924

Affected software / configurations for CVE-2021-1924

References for CVE-2021-1924