CVE-2024-20003Network attack vector

Remote crash via malformed NR RRC setup

Published Feb 5, 2024 · Updated Aug 1, 2024

Improper input validation in MediaTek Modem NL1 NR15 allows remote attackers to crash affected chipsets via a malformed NR RRC setup message. The Modem NL1 handler accepts invalid NR RRC Connection Setup input from the network without adequate validation and enters a system-crashing state. No authentication or user interaction is required, and the documented consequence is a service-interrupting crash rather than code execution or data exposure.

CVSS severity7.5
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in MediaTek Modem NL1 NR15 allows remote attackers to crash affected chipsets via a malformed NR RRC setup message. The Modem NL1 handler accepts invalid NR RRC Connection Setup input from the network without adequate validation and enters a system-crashing state. No authentication or user interaction is required, and the documented consequence is a service-interrupting crash rather than code execution or data exposure.

The record

CVE
CVE-2024-20003
Published
Feb 5, 2024
Updated
Aug 1, 2024
Vendor
MediaTek
Product
MT6889
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MediaTek · MT6889version=-
MediaTek · MT6880version=-
MediaTek · MT6875version=-
MediaTek · MT6891version=-
MediaTek · MT6890version=-
MediaTek · MT6855version=-
MediaTek · MT2735version=-
MediaTek · MT6893version=-
MediaTek · MT6885version=-
MediaTek · MT8791Tversion=-
MediaTek · MT6873version=-
MediaTek · MT8791version=-
MediaTek · MT6877version=-
MediaTek · MT8675version=-
MediaTek · MT6853version=-
MediaTek · MT6297version=-
MediaTek · MT6875Tversion=-
MediaTek · MT6883version=-
MediaTek · MT6833version=-
MediaTek · MT8797version=-

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-20Improper Input Validation
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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