What is the CVSS score of CVE-2025-20680?

CVE-2025-20680 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Nbiot Sdk are affected by CVE-2025-20680?

CVE-2025-20680 presents critical security risk, a heap-based buffer overflow vulnerability rated CVSS 9.8.

How to fix or mitigate CVE-2025-20680?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Nbiot Sdk CVE-2025-20680

EUVD-2025-20372 CRITICAL

Heap-based Buffer Overflow (CWE-122)

2025-07-08 security@mediatek.com

Heap Overflow Buffer Overflow Privilege Escalation Nbiot Sdk

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 16, 2026 - 04:21 euvd

EUVD-2025-20372

Analysis Generated

Mar 16, 2026 - 04:21 vuln.today

CVE Published

Jul 08, 2025 - 03:15 nvd

CRITICAL 9.8

DescriptionCVE.org

In Bluetooth driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418044; Issue ID: MSV-3482.

Analysis

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).