CVE-2025-21439 | Out-of-bounds Read in Windows WLAN Host

Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer.

Published: 2025-04-07 Last update: 2026-01-30 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-21439 is rated Moderate Risk (45/100): CVSS High severity, with low exploitation likelihood (EPSS 0.18%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-21439

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-16 0.07% 0.18% +0.11%
2 2026-02-01 0.01% 0.07% +0.05%
3 2025-04-07 — 0.01% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21439

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
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]

Weakness enumeration for CVE-2025-21439

Affected software / configurations for CVE-2025-21439

Vendor Product Version Raw CPE
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 qca6595au_firmware — cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
qualcomm qcm5430_firmware — cpe:2.3:o:qualcomm:qcm5430_firmware:-:*:*:*:*:*:*:*
qualcomm qcm6490_firmware — cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
qualcomm qcn7605_firmware — cpe:2.3:o:qualcomm:qcn7605_firmware:-:*:*:*:*:*:*:*
qualcomm qcn7606_firmware — cpe:2.3:o:qualcomm:qcn7606_firmware:-:*:*:*:*:*:*:*
qualcomm qcs5430_firmware — cpe:2.3:o:qualcomm:qcs5430_firmware:-:*:*:*:*:*:*:*
qualcomm qcs6490_firmware — cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
qualcomm video_collaboration_vc3_platform_firmware — cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:*:*:*:*:*:*:*
qualcomm sc8180x\+sdx55_firmware — cpe:2.3:o:qualcomm:sc8180x\+sdx55_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8c_compute_platform_\(sc8180x-ad\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8c_compute_platform_\(sc8180x-ad\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8c_compute_platform_\(sc8180xp-ad\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8c_compute_platform_\(sc8180xp-ad\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_compute_platform_\(sc8180x-aa\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_\(sc8180x-aa\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_compute_platform_\(sc8180x-ab\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_\(sc8180x-ab\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_compute_platform_\(sc8180xp-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_\(sc8180xp-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_compute_platform_\(sc8180xp-af\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_compute_platform_\(sc8180xp-af\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180x-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180x-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180x-af\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180x-af\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180xp-aa\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180xp-aa\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180xp-ab\)_firmware — cpe:2.3:o:qualcomm:snapdragon_8cx_gen_2_5g_compute_platform_\(sc8180xp-ab\)_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9370_firmware — cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9375_firmware — cpe:2.3:o:qualcomm:wcd9375_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9380_firmware — cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9385_firmware — cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*

References for CVE-2025-21439

cvelogic Threat Intelligence