CVE-2025-21428 [High] | Security Vulnerability in Snapdragon 439 Mobile Pla…

CVE-2025-21428 is rated Low Risk (33.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.21%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.56%	0.21%	-0.35%
2	2026-05-18	0.35%	0.56%	+0.20%
3	2026-02-01	—	0.35%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.56%

0.21%

-0.35%

2026-05-18

0.35%

0.56%

+0.20%

2026-02-01

—

0.35%

—

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]

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]

Affected software / configurations for CVE-2025-21428

Vendor	Product	Version	Raw CPE
qualcomm	snapdragon_439_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_439_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_625_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_625_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_626_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_626_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_632_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_632_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_820_automotive_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_820_automotive_platform_firmware:-:::::::*
qualcomm	snapdragon_auto_5g_modem-rf_firmware	—	cpe:2.3:o:qualcomm:snapdragon_auto_5g_modem-rf_firmware:-:::::::*
qualcomm	snapdragon_x12_lte_modem_firmware	—	cpe:2.3:o:qualcomm:snapdragon_x12_lte_modem_firmware:-:::::::*
qualcomm	snapdragon_x35_5g_modem-rf_system_firmware	—	cpe:2.3:o:qualcomm:snapdragon_x35_5g_modem-rf_system_firmware:-:::::::*
qualcomm	snapdragon_x5_lte_modem_firmware	—	cpe:2.3:o:qualcomm:snapdragon_x5_lte_modem_firmware:-:::::::*
qualcomm	vision_intelligence_100_platform_\(apq8053-aa\)_firmware	—	cpe:2.3:o:qualcomm:vision_intelligence_100_platform_\(apq8053-aa\)_firmware:-:::::::*
qualcomm	vision_intelligence_200_platform_\(apq8053-ac\)_firmware	—	cpe:2.3:o:qualcomm:vision_intelligence_200_platform_\(apq8053-ac\)_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	wcn3610_firmware	—	cpe:2.3:o:qualcomm:wcn3610_firmware:-:::::::*
qualcomm	wcn3615_firmware	—	cpe:2.3:o:qualcomm:wcn3615_firmware:-:::::::*
qualcomm	wcn3620_firmware	—	cpe:2.3:o:qualcomm:wcn3620_firmware:-:::::::*
qualcomm	wcn3660b_firmware	—	cpe:2.3:o:qualcomm:wcn3660b_firmware:-:::::::*
qualcomm	wcn3680_firmware	—	cpe:2.3:o:qualcomm:wcn3680_firmware:-:::::::*
qualcomm	wcn3680b_firmware	—	cpe:2.3:o:qualcomm:wcn3680b_firmware:-:::::::*
qualcomm	wcn3980_firmware	—	cpe:2.3:o:qualcomm:wcn3980_firmware:-:::::::*
qualcomm	wsa8810_firmware	—	cpe:2.3:o:qualcomm:wsa8810_firmware:-:::::::*
qualcomm	wsa8815_firmware	—	cpe:2.3:o:qualcomm:wsa8815_firmware:-:::::::*
qualcomm	9206_lte_modem_firmware	—	cpe:2.3:o:qualcomm:9206_lte_modem_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	ar8031_firmware	—	cpe:2.3:o:qualcomm:ar8031_firmware:-:::::::*
qualcomm	c-v2x_9150_firmware	—	cpe:2.3:o:qualcomm:c-v2x_9150_firmware:-:::::::*
qualcomm	csra6620_firmware	—	cpe:2.3:o:qualcomm:csra6620_firmware:-:::::::*
qualcomm	csra6640_firmware	—	cpe:2.3:o:qualcomm:csra6640_firmware:-:::::::*
qualcomm	fastconnect_6200_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:::::::*
qualcomm	fastconnect_6900_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:::::::*
qualcomm	mdm9250_firmware	—	cpe:2.3:o:qualcomm:mdm9250_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	msm8996au_firmware	—	cpe:2.3:o:qualcomm:msm8996au_firmware:-:::::::*
qualcomm	qca6174_firmware	—	cpe:2.3:o:qualcomm:qca6174_firmware:-:::::::*
qualcomm	qca6174a_firmware	—	cpe:2.3:o:qualcomm:qca6174a_firmware:-:::::::*
qualcomm	qca6175a_firmware	—	cpe:2.3:o:qualcomm:qca6175a_firmware:-:::::::*
qualcomm	qca6554a_firmware	—	cpe:2.3:o:qualcomm:qca6554a_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	qca6584_firmware	—	cpe:2.3:o:qualcomm:qca6584_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	qca9377_firmware	—	cpe:2.3:o:qualcomm:qca9377_firmware:-:::::::*
qualcomm	qca9379_firmware	—	cpe:2.3:o:qualcomm:qca9379_firmware:-:::::::*
qualcomm	qcm2150_firmware	—	cpe:2.3:o:qualcomm:qcm2150_firmware:-:::::::*
qualcomm	qep8111_firmware	—	cpe:2.3:o:qualcomm:qep8111_firmware:-:::::::*
qualcomm	qualcomm_205_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:qualcomm_205_mobile_platform_firmware:-:::::::*
qualcomm	qualcomm_215_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:qualcomm_215_mobile_platform_firmware:-:::::::*
qualcomm	sa2150p_firmware	—	cpe:2.3:o:qualcomm:sa2150p_firmware:-:::::::*
qualcomm	sd626_firmware	—	cpe:2.3:o:qualcomm:sd626_firmware:-:::::::*
qualcomm	sdm429w_firmware	—	cpe:2.3:o:qualcomm:sdm429w_firmware:-:::::::*
qualcomm	smart_audio_200_platform_firmware	—	cpe:2.3:o:qualcomm:smart_audio_200_platform_firmware:-:::::::*
qualcomm	smart_audio_400_platform_firmware	—	cpe:2.3:o:qualcomm:smart_audio_400_platform_firmware:-:::::::*
qualcomm	smart_display_200_platform_\(apq5053-aa\)_firmware	—	cpe:2.3:o:qualcomm:smart_display_200_platform_\(apq5053-aa\)_firmware:-:::::::*
qualcomm	snapdragon_1200_wearable_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_1200_wearable_platform_firmware:-:::::::*
qualcomm	snapdragon_210_processor_firmware	—	cpe:2.3:o:qualcomm:snapdragon_210_processor_firmware:-:::::::*
qualcomm	snapdragon_212_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_212_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_425_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_425_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_429_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_429_mobile_platform_firmware:-:::::::*

References for CVE-2025-21428

URL	Tags
https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2025-bulletin.html	Vendor Advisory

URL

CVE-2025-21428 | Buffer Over-read in WLAN Host

Exploit prediction scoring system (EPSS) score for CVE-2025-21428

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21428

Weakness enumeration for CVE-2025-21428

Affected software / configurations for CVE-2025-21428

References for CVE-2025-21428