CVE-2023-20812

Local information disclosure via out-of-bounds WLAN write

Published Aug 7, 2023 · Updated Oct 28, 2024

An out-of-bounds write in the MediaTek WLAN driver for Android 13.0 and IoT 23.0 allows local users to disclose information. The driver writes beyond the intended buffer after improperly validating input; MediaTek has not disclosed the affected function or input path. Exploitation requires System execution privileges and no user interaction, and the reported consequence is limited to local information disclosure.

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 write in the MediaTek WLAN driver for Android 13.0 and IoT 23.0 allows local users to disclose information. The driver writes beyond the intended buffer after improperly validating input; MediaTek has not disclosed the affected function or input path. Exploitation requires System execution privileges and no user interaction, and the reported consequence is limited to local information disclosure.

The record

CVE
CVE-2023-20812
Published
Aug 7, 2023
Updated
Oct 28, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, CWE-787
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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?

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
4.4NVDCVSS: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.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-787Out-of-bounds Write

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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