CVE-2024-20017Public exploitNetwork attack vector

Unauthenticated code execution via unchecked packet length

Published Mar 4, 2024 · Updated Sep 25, 2024

Out-of-bounds write in MediaTek MT6890, MT7915, MT7916, MT7981, and MT7986 WLAN service allows remote attackers to execute code. IAPP_RcvHandlerSSB copies an attacker-controlled security-block length into a 167-byte stack object while allowing packet lengths up to 1,600 bytes. No authentication or user interaction is required; a crafted TCP or UDP command can corrupt the service stack and redirect execution.

CVSS severity9.8
Critical
EPSS probability46.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in MediaTek MT6890, MT7915, MT7916, MT7981, and MT7986 WLAN service allows remote attackers to execute code. IAPP_RcvHandlerSSB copies an attacker-controlled security-block length into a 167-byte stack object while allowing packet lengths up to 1,600 bytes. No authentication or user interaction is required; a crafted TCP or UDP command can corrupt the service stack and redirect execution.

The record

CVE
CVE-2024-20017
Published
Mar 4, 2024
Updated
Sep 25, 2024
Vendor
MediaTek
Product
MT7916
Classifications
CWE-20, CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MediaTek · MT7916version=0 <=*
MediaTek · MT6890version=0 <=*
MediaTek · MT7915version=0 <=*
MediaTek · MT7986version=0 <=*
MediaTek · MT7981version=0 <=*

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

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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