CVE-2023-20677

Local information disclosure via unchecked WLAN bounds

Published Apr 6, 2023 · Updated Oct 23, 2024

Out-of-bounds read in MediaTek WLAN software allows local users with System privileges to disclose memory without user interaction. The WLAN component reads beyond a buffer because a required bounds check is missing; MediaTek has not disclosed the function or input involved. Exploitation requires existing System execution privileges, 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

Out-of-bounds read in MediaTek WLAN software allows local users with System privileges to disclose memory without user interaction. The WLAN component reads beyond a buffer because a required bounds check is missing; MediaTek has not disclosed the function or input involved. Exploitation requires existing System execution privileges, and the reported consequence is limited to local information disclosure.

The record

CVE
CVE-2023-20677
Published
Apr 6, 2023
Updated
Oct 23, 2024
Vendor
MediaTek
Product
MT8175
Classifications
CWE-125
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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 vectorlocal
Required privilegesadmin

What is affected?

MediaTek · MT8175version=0 <=*
MediaTek · MT8768version=0 <=*
MediaTek · MT7921version=0 <=*
MediaTek · MT8771version=0 <=*
MediaTek · MT6789version=0 <=*
MediaTek · MT8518version=0 <=*
MediaTek · MT8167Sversion=0 <=*
MediaTek · MT6855version=0 <=*
MediaTek · MT8766version=0 <=*
MediaTek · MT5221version=0 <=*
MediaTek · MT8385version=0 <=*
MediaTek · MT8798version=0 <=*
Yocto Project · Yocto Projectversion=3.1; version=3.3; version=4.0
MediaTek · MT7668version=0 <=*
MediaTek · MT8791Tversion=0 <=*
MediaTek · MT8532version=0 <=*
MediaTek · MT6879version=0 <=*
MediaTek · MT8169version=0 <=*
MediaTek · MT6781version=0 <=*
MediaTek · MT6877version=0 <=*
MediaTek · MT8786version=0 <=*
MediaTek · MT7902version=0 <=*
Google · Androidversion=11.0; version=12.0; version=13.0
MediaTek · MT8675version=0 <=*
MediaTek · MT8781version=0 <=*
MediaTek · MT8789version=0 <=*
MediaTek · MT8185version=0 <=*
MediaTek · MT8365version=0 <=*
MediaTek · MT8788version=0 <=*
MediaTek · MT6833version=0 <=*
MediaTek · MT8797version=0 <=*
MediaTek · MT6983version=0 <=*
MediaTek · MT8362Aversion=0 <=*
MediaTek · MT8168version=0 <=*
MediaTek · MT8695version=0 <=*
MediaTek · MT7663version=0 <=*
MediaTek · MT6895version=0 <=*

Published CVSS scores

4.4NIST NVDCVSS: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 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

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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