How to fix CVE-2025-21461?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. If patching is delayed, consider network segmentation to limit exposure.

Is Memory Corruption affected by CVE-2025-21461?

CVE-2025-21461 presents notable security risk, a out-of-bounds write vulnerability rated CVSS 7.8. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code.

CVE-2025-21461

HIGH

2025-08-06 [email protected]

7.8

CVSS 3.1

CVSS Vector

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

Analysis Generated

Mar 28, 2026 - 19:05 vuln.today

CVE Published

Aug 06, 2025 - 08:15 nvd

HIGH 7.8

Tags

Memory Corruption Buffer Overflow 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

Description

Memory corruption when programming registers through virtual CDM.

Analysis

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 Context

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.

Affected Products

Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Sm6650 Firmware, Qualcomm Sm7635 Firmware, Qualcomm Sm7675 Firmware.

Remediation

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).

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +39

POC: 0

CVE-2025-21461 vulnerability details – vuln.today

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CVE-2025-21461

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

Priority Score

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External POC / Exploit Code