CVE-2022-21755

Local information disclosure via incorrect bounds check

Published Jun 6, 2022 · Updated Aug 3, 2024

Improper input validation in the MediaTek WLAN driver for Android 11.0 and 12.0 allows local users to disclose information. The driver applies an incorrect bounds check before reading a buffer, permitting an out-of-bounds read; MediaTek has not disclosed the affected routine or input. Exploitation requires System execution privileges, needs no user interaction, and exposes memory contents without reported integrity or availability impact.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in the MediaTek WLAN driver for Android 11.0 and 12.0 allows local users to disclose information. The driver applies an incorrect bounds check before reading a buffer, permitting an out-of-bounds read; MediaTek has not disclosed the affected routine or input. Exploitation requires System execution privileges, needs no user interaction, and exposes memory contents without reported integrity or availability impact.

The record

CVE
CVE-2022-21755
Published
Jun 6, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

No CVSS assessment is available in this record.

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-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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