CVE-2025-21488 [High] | Information Disclosure in Fastconnect 6200 Firmware

CVE-2025-21488 is rated Low Risk (38.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.24%). 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	0.05%	0.24%	+0.19%
2	2026-04-20	0.04%	0.05%	+0.01%
3	2026-01-29	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.05%

0.24%

+0.19%

2026-04-20

0.04%

0.05%

+0.01%

2026-01-29

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.2	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L` 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:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	3.9	4.2	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.2

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L 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:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

3.9

4.2

[email protected]

Affected software / configurations for CVE-2025-21488

Vendor	Product	Version	Raw CPE
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_6900_firmware	—	cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:::::::*
qualcomm	fastconnect_7800_firmware	—	cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:::::::*
qualcomm	msm8996au_firmware	—	cpe:2.3:o:qualcomm:msm8996au_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	qca6595au_firmware	—	cpe:2.3:o:qualcomm:qca6595au_firmware:-:::::::*
qualcomm	qca6696_firmware	—	cpe:2.3:o:qualcomm:qca6696_firmware:-:::::::*
qualcomm	qcm4490_firmware	—	cpe:2.3:o:qualcomm:qcm4490_firmware:-:::::::*
qualcomm	qcs410_firmware	—	cpe:2.3:o:qualcomm:qcs410_firmware:-:::::::*
qualcomm	qcs4490_firmware	—	cpe:2.3:o:qualcomm:qcs4490_firmware:-:::::::*
qualcomm	qcs610_firmware	—	cpe:2.3:o:qualcomm:qcs610_firmware:-:::::::*
qualcomm	qmp1000_firmware	—	cpe:2.3:o:qualcomm:qmp1000_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	sa6145p_firmware	—	cpe:2.3:o:qualcomm:sa6145p_firmware:-:::::::*
qualcomm	sa6155_firmware	—	cpe:2.3:o:qualcomm:sa6155_firmware:-:::::::*
qualcomm	sa6155p_firmware	—	cpe:2.3:o:qualcomm:sa6155p_firmware:-:::::::*
qualcomm	sa8155_firmware	—	cpe:2.3:o:qualcomm:sa8155_firmware:-:::::::*
qualcomm	sa8155p_firmware	—	cpe:2.3:o:qualcomm:sa8155p_firmware:-:::::::*
qualcomm	sd_8_gen1_5g_firmware	—	cpe:2.3:o:qualcomm:sd_8_gen1_5g_firmware:-:::::::*
qualcomm	sd660_firmware	—	cpe:2.3:o:qualcomm:sd660_firmware:-:::::::*
qualcomm	sd670_firmware	—	cpe:2.3:o:qualcomm:sd670_firmware:-:::::::*
qualcomm	sd865_5g_firmware	—	cpe:2.3:o:qualcomm:sd865_5g_firmware:-:::::::*
qualcomm	sdm429w_firmware	—	cpe:2.3:o:qualcomm:sdm429w_firmware:-:::::::*
qualcomm	sg4150p_firmware	—	cpe:2.3:o:qualcomm:sg4150p_firmware:-:::::::*
qualcomm	sm4125_firmware	—	cpe:2.3:o:qualcomm:sm4125_firmware:-:::::::*
qualcomm	sm4635_firmware	—	cpe:2.3:o:qualcomm:sm4635_firmware:-:::::::*
qualcomm	sm6370_firmware	—	cpe:2.3:o:qualcomm:sm6370_firmware:-:::::::*
qualcomm	sm6650_firmware	—	cpe:2.3:o:qualcomm:sm6650_firmware:-:::::::*
qualcomm	sm7635_firmware	—	cpe:2.3:o:qualcomm:sm7635_firmware:-:::::::*
qualcomm	sm7675_firmware	—	cpe:2.3:o:qualcomm:sm7675_firmware:-:::::::*
qualcomm	sm7675p_firmware	—	cpe:2.3:o:qualcomm:sm7675p_firmware:-:::::::*
qualcomm	sm8550p_firmware	—	cpe:2.3:o:qualcomm:sm8550p_firmware:-:::::::*
qualcomm	sm8635_firmware	—	cpe:2.3:o:qualcomm:sm8635_firmware:-:::::::*
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	snapdragon_4_gen_1_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_4_gen_1_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_4_gen_2_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_4_gen_2_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_429_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_429_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_460_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_460_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_480_5g_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_480_5g_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_480\+_5g_mobile_platform_\(sm4350-ac\)_firmware	—	cpe:2.3:o:qualcomm:snapdragon_480\+_5g_mobile_platform_\(sm4350-ac\)_firmware:-:::::::*
qualcomm	snapdragon_660_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_660_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_662_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_662_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_670_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_670_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_680_4g_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_680_4g_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_685_4g_mobile_platform_\(sm6225-ad\)_firmware	—	cpe:2.3:o:qualcomm:snapdragon_685_4g_mobile_platform_\(sm6225-ad\)_firmware:-:::::::*
qualcomm	snapdragon_695_5g_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_695_5g_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_710_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_710_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_8_gen_1_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8_gen_1_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_8_gen_2_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8_gen_2_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_8_gen_3_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8_gen_3_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_8\+_gen_1_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8\+_gen_1_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_8\+_gen_2_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_8\+_gen_2_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_820_automotive_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_820_automotive_platform_firmware:-:::::::*
qualcomm	snapdragon_845_mobile_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_845_mobile_platform_firmware:-:::::::*
qualcomm	snapdragon_w5\+_gen_1_wearable_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_w5\+_gen_1_wearable_platform_firmware:-:::::::*
qualcomm	snapdragon_xr1_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_xr1_platform_firmware:-:::::::*
qualcomm	snapdragon_xr2_5g_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_xr2_5g_platform_firmware:-:::::::*
qualcomm	snapdragon_xr2\+_gen_1_platform_firmware	—	cpe:2.3:o:qualcomm:snapdragon_xr2\+_gen_1_platform_firmware:-:::::::*
qualcomm	sw5100_firmware	—	cpe:2.3:o:qualcomm:sw5100_firmware:-:::::::*
qualcomm	sw5100p_firmware	—	cpe:2.3:o:qualcomm:sw5100p_firmware:-:::::::*
qualcomm	sxr1120_firmware	—	cpe:2.3:o:qualcomm:sxr1120_firmware:-:::::::*
qualcomm	talynplus_firmware	—	cpe:2.3:o:qualcomm:talynplus_firmware:-:::::::*
qualcomm	wcd9326_firmware	—	cpe:2.3:o:qualcomm:wcd9326_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	wcd9370_firmware	—	cpe:2.3:o:qualcomm:wcd9370_firmware:-:::::::*
qualcomm	wcd9375_firmware	—	cpe:2.3:o:qualcomm:wcd9375_firmware:-:::::::*
qualcomm	wcd9378_firmware	—	cpe:2.3:o:qualcomm:wcd9378_firmware:-:::::::*

References for CVE-2025-21488

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

URL

CVE-2025-21488 | Buffer Over-read in Data Network Stack & Connectivity

Exploit prediction scoring system (EPSS) score for CVE-2025-21488

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21488

Weakness enumeration for CVE-2025-21488

Affected software / configurations for CVE-2025-21488

References for CVE-2025-21488