CVE-2025-20673

Local system crash via null pointer dereference

Published Jun 2, 2025 · Updated Jun 2, 2025

Null pointer dereference in MediaTek WLAN STA driver NB SDK 3.6 and earlier allows local users to crash the system without interaction. The WLAN STA driver dereferences a null pointer and leaves the resulting exception uncaught; MediaTek has not disclosed the triggering input or narrower code locus. User-level execution privileges are required, and the documented consequence is a system crash without confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in MediaTek WLAN STA driver NB SDK 3.6 and earlier allows local users to crash the system without interaction. The WLAN STA driver dereferences a null pointer and leaves the resulting exception uncaught; MediaTek has not disclosed the triggering input or narrower code locus. User-level execution privileges are required, and the documented consequence is a system crash without confidentiality or integrity impact.

The record

CVE
CVE-2025-20673
Published
Jun 2, 2025
Updated
Jun 2, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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