CVE-2025-20750

System crash via modem null-pointer dereference

Published Dec 2, 2025 · Updated Feb 17, 2026

A null-pointer dereference in MediaTek Modem NR15 allows remote attackers controlling a rogue base station to crash the connected system. The modem improperly validates base-station input and dereferences a null pointer, but MediaTek has not disclosed the affected routine or message type. Exploitation requires the user equipment to connect to the attacker-controlled base station; it needs no privileges or user interaction and affects availability only.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A null-pointer dereference in MediaTek Modem NR15 allows remote attackers controlling a rogue base station to crash the connected system. The modem improperly validates base-station input and dereferences a null pointer, but MediaTek has not disclosed the affected routine or message type. Exploitation requires the user equipment to connect to the attacker-controlled base station; it needs no privileges or user interaction and affects availability only.

The record

CVE
CVE-2025-20750
Published
Dec 2, 2025
Updated
Feb 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 17, 2026Record 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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