CVE-2023-20782

Local information disclosure via missing bounds check

Published Aug 7, 2023 · Updated Oct 17, 2024

Information disclosure in MediaTek keyinstall on Android 12.0 and 13.0 allows local users with System privileges to read memory. The keyinstall component fails to check an input boundary before accessing memory, exposing data beyond the intended bounds. Exploitation requires System execution privileges on a device using an affected MediaTek chipset, but no user interaction; the impact 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

Information disclosure in MediaTek keyinstall on Android 12.0 and 13.0 allows local users with System privileges to read memory. The keyinstall component fails to check an input boundary before accessing memory, exposing data beyond the intended bounds. Exploitation requires System execution privileges on a device using an affected MediaTek chipset, but no user interaction; the impact is limited to local information disclosure.

The record

CVE
CVE-2023-20782
Published
Aug 7, 2023
Updated
Oct 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1533
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 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

4.4NIST 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.

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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-20Improper Input Validation
T1533Data from Local System

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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