What is the CVSS score of CVE-2026-20423?

CVE-2026-20423 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Nbiot Sdk are affected by CVE-2026-20423?

A high-severity privilege escalation vulnerability in Nbiot SDK allows local attackers with user-level access to gain elevated system privileges.

How to fix or mitigate CVE-2026-20423?

Within 24 hours: Inventory all systems and applications using Nbiot SDK and assess exposure scope; disable Nbiot SDK features if non-critical. Within 7 days: Implement network segmentation to isolate affected systems; restrict local access privileges and enforce principle of least privilege for user accounts. Within 30 days: Monitor vendor communications for patch availability; develop and test patching procedures; implement enhanced logging and monitoring for privilege escalation attempts on affected systems.

Nbiot Sdk CVE-2026-20423

HIGH

Exposed Dangerous Method or Function (CWE-749)

2026-03-02 security@mediatek.com

Privilege Escalation Nbiot Sdk

7.8

CVSS 3.1 · NVD

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

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Mar 02, 2026 - 09:16 nvd

HIGH 7.8

DescriptionCVE.org

In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.

AnalysisAI

Nbiot Sdk contains a vulnerability that allows attackers to local escalation of privilege with User execution privileges needed (CVSS 7.8).

Technical ContextAI

affects Nbiot Sdk. In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.