CVE-2025-21449 [High] | Out-of-bounds Read in Sm8635p Firmware

CVE-2025-21449 is rated Low Risk (33.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.20%). 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	0.35%	0.20%	-0.15%
2	2026-05-04	0.05%	0.35%	+0.30%
3	2025-12-16	—	0.05%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.35%

0.20%

-0.15%

2026-05-04

0.05%

0.35%

+0.30%

2025-12-16

—

0.05%

—

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-2025-21449

Vendor	Product	Version	Raw CPE
qualcomm	sm8635p_firmware	—	cpe:2.3:o:qualcomm:sm8635p_firmware:-:::::::*
qualcomm	sm8650q_firmware	—	cpe:2.3:o:qualcomm:sm8650q_firmware:-:::::::*
qualcomm	sm8735_firmware	—	cpe:2.3:o:qualcomm:sm8735_firmware:-:::::::*
qualcomm	sm8750_firmware	—	cpe:2.3:o:qualcomm:sm8750_firmware:-:::::::*
qualcomm	sm8750p_firmware	—	cpe:2.3:o:qualcomm:sm8750p_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	snapdragon_4_gen_1_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_4_gen_1_mobile_firmware:-:::::::*
qualcomm	snapdragon_4_gen_2_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_4_gen_2_mobile_firmware:-:::::::*
qualcomm	snapdragon_460_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_460_mobile_firmware:-:::::::*
qualcomm	snapdragon_480_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_480_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_480\+_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_480\+_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_660_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_660_mobile_firmware:-:::::::*
qualcomm	snapdragon_662_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_662_mobile_firmware:-:::::::*
qualcomm	snapdragon_665_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_665_mobile_firmware:-:::::::*
qualcomm	snapdragon_670_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_670_mobile_firmware:-:::::::*
qualcomm	snapdragon_675_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_675_mobile_firmware:-:::::::*
qualcomm	snapdragon_678_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_678_mobile_firmware:-:::::::*
qualcomm	snapdragon_680_4g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_680_4g_mobile_firmware:-:::::::*
qualcomm	snapdragon_685_4g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_685_4g_mobile_firmware:-:::::::*
qualcomm	snapdragon_690_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_690_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_695_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_695_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_710_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_710_mobile_firmware:-:::::::*
qualcomm	snapdragon_712_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_712_mobile_firmware:-:::::::*
qualcomm	snapdragon_720g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_720g_mobile_firmware:-:::::::*
qualcomm	snapdragon_730_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_730_mobile_firmware:-:::::::*
qualcomm	snapdragon_730g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_730g_mobile_firmware:-:::::::*
qualcomm	snapdragon_732g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_732g_mobile_firmware:-:::::::*
qualcomm	snapdragon_750g_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_750g_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_765_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_765_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_765g_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_765g_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_768g_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_768g_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_778g_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_778g_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_778g\+_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_778g\+_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_780g_5g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_780g_5g_mobile_firmware:-:::::::*
qualcomm	snapdragon_782g_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_782g_mobile_firmware:-:::::::*
qualcomm	snapdragon_7c_compute_firmware	—	cpe:2.3:o:qualcomm:snapdragon_7c_compute_firmware:-:::::::*
qualcomm	sc7180-ad_firmware	—	cpe:2.3:o:qualcomm:sc7180-ad_firmware:-:::::::*
qualcomm	snapdragon_7c\+_gen_3_compute_firmware	—	cpe:2.3:o:qualcomm:snapdragon_7c\+_gen_3_compute_firmware:-:::::::*
qualcomm	snapdragon_8_gen_1_mobile_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8_gen_1_mobile_firmware:-:::::::*
qualcomm	315_5g_iot_firmware	—	cpe:2.3:o:qualcomm:315_5g_iot_firmware:-:::::::*
qualcomm	apq8017_firmware	—	cpe:2.3:o:qualcomm:apq8017_firmware:-:::::::*
qualcomm	apq8064au_firmware	—	cpe:2.3:o:qualcomm:apq8064au_firmware:-:::::::*
qualcomm	aqt1000_firmware	—	cpe:2.3:o:qualcomm:aqt1000_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	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	fastconnect_6200_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:::::::*
qualcomm	fastconnect_6700_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6700_firmware:-:::::::*
qualcomm	fastconnect_6800_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6800_firmware:-:::::::*
qualcomm	fastconnect_6900_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:::::::*
qualcomm	fastconnect_7800_firmware	—	cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:::::::*
qualcomm	flight_rb5_5g_firmware	—	cpe:2.3:o:qualcomm:flight_rb5_5g_firmware:-:::::::*
qualcomm	home_hub_100_firmware	—	cpe:2.3:o:qualcomm:home_hub_100_firmware:-:::::::*
qualcomm	immersive_home_214_firmware	—	cpe:2.3:o:qualcomm:immersive_home_214_firmware:-:::::::*
qualcomm	immersive_home_216_firmware	—	cpe:2.3:o:qualcomm:immersive_home_216_firmware:-:::::::*
qualcomm	immersive_home_316_firmware	—	cpe:2.3:o:qualcomm:immersive_home_316_firmware:-:::::::*
qualcomm	immersive_home_318_firmware	—	cpe:2.3:o:qualcomm:immersive_home_318_firmware:-:::::::*
qualcomm	video_collaboration_vc1_platform_firmware	—	cpe:2.3:o:qualcomm:video_collaboration_vc1_platform_firmware:-:::::::*
qualcomm	video_collaboration_vc3_platform_firmware	—	cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:::::::*
qualcomm	video_collaboration_vc5_platform_firmware	—	cpe:2.3:o:qualcomm:video_collaboration_vc5_platform_firmware:-:::::::*
qualcomm	robotics_rb2_firmware	—	cpe:2.3:o:qualcomm:robotics_rb2_firmware:-:::::::*
qualcomm	robotics_rb3_firmware	—	cpe:2.3:o:qualcomm:robotics_rb3_firmware:-:::::::*
qualcomm	robotics_rb5_firmware	—	cpe:2.3:o:qualcomm:robotics_rb5_firmware:-:::::::*
qualcomm	sa4150p_firmware	—	cpe:2.3:o:qualcomm:sa4150p_firmware:-:::::::*
qualcomm	sa4155p_firmware	—	cpe:2.3:o:qualcomm:sa4155p_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	sa7255p_firmware	—	cpe:2.3:o:qualcomm:sa7255p_firmware:-:::::::*
qualcomm	sa7775p_firmware	—	cpe:2.3:o:qualcomm:sa7775p_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:-:::::::*

References for CVE-2025-21449

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

URL

CVE-2025-21449 | Buffer Over-read in WLAN Embedded SW

Exploit prediction scoring system (EPSS) score for CVE-2025-21449

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21449

Weakness enumeration for CVE-2025-21449

Affected software / configurations for CVE-2025-21449

References for CVE-2025-21449