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Fastconnect 6700 Firmware CVE-2025-21439

HIGH
Out-of-bounds Write (CWE-787)
2025-04-07 product-security@qualcomm.com
Buffer Overflow Memory Corruption Fastconnect 6700 Firmware Fastconnect 6900 Firmware Qca6595au Firmware Qcm5430 Firmware Qcm6490 Firmware Qcn7606 Firmware Qcs5430 Firmware Qcs6490 Firmware Video Collaboration Vc3 Platform Firmware Wcd9370 Firmware Wcd9375 Firmware Wcd9380 Firmware Wcd9385 Firmware Snapdragon 8Cx Gen 2 5G Compute Platform Sc8180X Ac Firmware Snapdragon 8Cx Gen 2 5G Compute Platform Sc8180X Af Firmware Snapdragon 8Cx Compute Platform Sc8180Xp Ac Firmware Snapdragon 8Cx Gen 2 5G Compute Platform Sc8180Xp Aa Firmware Snapdragon 8Cx Gen 2 5G Compute Platform Sc8180Xp Ab Firmware Snapdragon 8Cx Compute Platform Sc8180Xp Af Firmware Snapdragon 8Cx Compute Platform Sc8180X Aa Firmware Snapdragon 8Cx Compute Platform Sc8180X Ab Firmware Snapdragon 8C Compute Platform Sc8180Xp Ad Firmware Snapdragon 8C Compute Platform Sc8180X Ad Firmware Sc8180X Sdx55 Firmware Qcn7605 Firmware
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 28, 2026 - 18:35 vuln.today
CVE Published
Apr 07, 2025 - 11:15 nvd
HIGH 7.8

DescriptionNVD

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

AnalysisAI

Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Memory corruption may occur while reading board data via IOCTL call when the WLAN driver copies the content to the provided output buffer. Affected products include: Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Qca6595Au Firmware, Qualcomm Qcm5430 Firmware, Qualcomm Qcm6490 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

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CVE-2025-21439 vulnerability details – vuln.today
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