What is CVE-2025-21439?

CVE-2025-21439 is a high-severity vulnerability in Qualcomm Fastconnect_6700, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-04-07.

How severe is CVE-2025-21439?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Qualcomm Fastconnect_6700

CVE-2025-21439

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

Vulnerability class: Buffer Overflow

EPSS: 0.001 (0.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qualcomm Fastconnect_6700
Qualcomm Fastconnect_6700_firmware
Qualcomm Fastconnect_6900
Qualcomm Fastconnect_6900_firmware
Qualcomm Qca6595au
Qualcomm Qca6595au_firmware
Qualcomm Qcm5430
Qualcomm Qcm5430_firmware
Qualcomm Qcm6490
Qualcomm Qcm6490_firmware

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

product-security@qualcomm.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-21439?: CVE-2025-21439 is a high-severity vulnerability in Qualcomm Fastconnect_6700, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-04-07.
How severe is CVE-2025-21439?: High severity. CVSS v3 base score is 7.8 out of 10.