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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2025-21439- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
EUVDEUVD-2025-9993
Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer.
- Record
EUVD-2025-9993- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4fr5-x8r3-mvxg
Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies...
Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer.
- Record
GHSA-4fr5-x8r3-mvxg- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
NVD
Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer.
- Record
CVE-2025-21439- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
Affected products
- qualcomm fastconnect 6700 firmware
- qualcomm fastconnect 6900 firmware
- qualcomm qca6595au firmware
- qualcomm qcm5430 firmware
- qualcomm qcm6490 firmware
- qualcomm qcn7605 firmware
- qualcomm qcn7606 firmware
- qualcomm qcs5430 firmware
- qualcomm qcs6490 firmware
- qualcomm sc8180x\+sdx55 firmware
- qualcomm snapdragon 8c compute platform \(sc8180x-ad\) firmware
- qualcomm snapdragon 8c compute platform \(sc8180xp-ad\) firmware
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- qualcomm snapdragon 8cx compute platform \(sc8180x-aa\) firmware
- qualcomm snapdragon 8cx compute platform \(sc8180x-ab\) firmware
- qualcomm snapdragon 8cx compute platform \(sc8180xp-ac\) firmware
- qualcomm snapdragon 8cx compute platform \(sc8180xp-af\) firmware
- qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180x-ac\) firmware
- qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180x-af\) firmware
- qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180xp-aa\) firmware
- qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180xp-ab\) firmware
- qualcomm video collaboration vc3 platform firmware
- qualcomm wcd9370 firmware
- qualcomm wcd9375 firmware
- qualcomm wcd9380 firmware
- qualcomm wcd9385 firmware
- qualcomm, inc. snapdragon
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-21439 is a high vulnerability (CVSS 7.8) in Qualcomm Fastconnect 6700 Firmware, published April 7, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. No source names a fixed version.