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Fastconnect 6900 Firmware CVE-2025-21461

HIGH
Out-of-bounds Write (CWE-787)
2025-08-06 product-security@qualcomm.com
Buffer Overflow Memory Corruption Fastconnect 6900 Firmware Fastconnect 7800 Firmware Sm6650 Firmware Sm7635 Firmware Sm7675 Firmware Sm7675p Firmware Sm8635 Firmware Sm8635p Firmware Snapdragon 8 Gen 1 Mobile Platform Firmware Snapdragon 8 Gen 3 Mobile Platform Firmware Wcd9370 Firmware Wcd9375 Firmware Wcd9378 Firmware Wcd9380 Firmware Wcd9390 Firmware Wcd9395 Firmware Wcn6650 Firmware Wcn6755 Firmware Wsa8830 Firmware Wsa8832 Firmware Wsa8835 Firmware Wsa8840 Firmware Wsa8845 Firmware Wsa8845h Firmware
7.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

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 - 19:05 vuln.today
CVE Published
Aug 06, 2025 - 08:15 nvd
HIGH 7.8

DescriptionCVE.org

Memory corruption when programming registers through virtual CDM.

AnalysisAI

Memory corruption when programming registers through virtual CDM. 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 when programming registers through virtual CDM. Affected products include: Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Sm6650 Firmware, Qualcomm Sm7635 Firmware, Qualcomm Sm7675 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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Same weakness CWE-787 – Out-of-bounds Write

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Same technique Buffer Overflow

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CVE-2025-21461 vulnerability details – vuln.today
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