Cyber Resilience

CVE-2025-21439

High

Published: 07 April 2025

Published
07 April 2025
Modified
30 January 2026
KEV Added
—
Patch
—
CVSS Score v3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0017 37.8th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-21439 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Qualcomm Fastconnect 6700 Firmware. Its CVSS base score is 7.8 (High).

Operationally, ranked at the 37.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

qualcomm
fastconnect 6700 firmware
all versions
qualcomm
fastconnect 6900 firmware
all versions
qualcomm
qca6595au firmware
all versions
qualcomm
qcm5430 firmware
all versions
qualcomm
qcm6490 firmware
all versions
qualcomm
qcn7605 firmware
all versions
qualcomm
qcn7606 firmware
all versions
qualcomm
qcs5430 firmware
all versions
qualcomm
qcs6490 firmware
all versions
qualcomm
video collaboration vc3 platform firmware
all versions
+15 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References