CVE-2023-20731

Local information disclosure via WLAN bounds omission

Published Jun 6, 2023 · Updated Jan 8, 2025

An out-of-bounds read in MediaTek WLAN software allows local users to disclose memory on affected Android and Yocto chipsets. The WLAN component reads beyond a buffer because it omits a required bounds check, exposing adjacent memory to the caller. The affected software runs on Android 12.0 and 13.0 or Yocto 3.1, 3.3, and 4.0; exploitation requires System execution privileges and no user interaction.

CVSS severity4.4
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in MediaTek WLAN software allows local users to disclose memory on affected Android and Yocto chipsets. The WLAN component reads beyond a buffer because it omits a required bounds check, exposing adjacent memory to the caller. The affected software runs on Android 12.0 and 13.0 or Yocto 3.1, 3.3, and 4.0; exploitation requires System execution privileges and no user interaction.

The record

CVE
CVE-2023-20731
Published
Jun 6, 2023
Updated
Jan 8, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, CWE-20
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-20Improper Input Validation

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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