CVE-2023-20818

Local information disclosure via out-of-bounds read

Published Aug 7, 2023 · Updated Oct 22, 2024

Out-of-bounds read in MediaTek wlan service on Android 12.0 and 13.0 allows local users to disclose information. The wlan service insufficiently validates input before a read, causing access beyond the intended bounds. Exploitation requires System execution privileges, needs no user interaction, and has no reported integrity or availability impact.

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

Out-of-bounds read in MediaTek wlan service on Android 12.0 and 13.0 allows local users to disclose information. The wlan service insufficiently validates input before a read, causing access beyond the intended bounds. Exploitation requires System execution privileges, needs no user interaction, and has no reported integrity or availability impact.

The record

CVE
CVE-2023-20818
Published
Aug 7, 2023
Updated
Oct 22, 2024
Vendor
MediaTek
Product
MT6889
Classifications
CWE-125, CWE-20
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=0 <=*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

MediaTek · MT6889version=0 <=*
MediaTek · MT6875version=0 <=*
MediaTek · MT6891version=0 <=*
MediaTek · MT6768version=0 <=*
MediaTek · MT6853Tversion=0 <=*
MediaTek · MT6855version=0 <=*
MediaTek · MediaTek MT6765version=0 <=*
MediaTek · MT6893version=0 <=*
MediaTek · MT6885version=0 <=*
MediaTek · MT6879version=0 <=*
MediaTek · MT6873version=0 <=*
MediaTek · MT6781version=0 <=*
MediaTek · MT6739version=0 <=*
MediaTek · MT6877version=0 <=*
MediaTek · MT6886version=0 <=*
MediaTek · MediaTek MT6761version=0 <=*
Google · Androidversion=12.0; version=13.0.0
MediaTek · MT6853version=0 <=*
MediaTek · MT6883version=0 <=*
MediaTek · MT6985version=0 <=*
MediaTek · MT6833version=0 <=*
MediaTek · MT6983version=0 <=*
MediaTek · MediaTek MT6580version=0 <=*
MediaTek · MediaTek MT6779version=0 <=*
MediaTek · MT6895version=0 <=*

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.

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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)
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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