CVE-2022-20066

Local information disclosure via incorrect ATF error handling

Published Apr 11, 2022 · Updated Aug 3, 2024

Information disclosure in MediaTek ATF HWFDE on affected Android 11.0 and 12.0 chipsets allows local users to read sensitive information. The vendor identifies incorrect error handling in the HWFDE portion of ATF but does not publish the failing error path or leaked data. Exploitation requires System execution privileges, needs no user interaction, and has no reported integrity or availability impact.

CVSS severity4.4
Medium
EPSS probability0.13%
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 ATF HWFDE on affected Android 11.0 and 12.0 chipsets allows local users to read sensitive information. The vendor identifies incorrect error handling in the HWFDE portion of ATF but does not publish the failing error path or leaked data. Exploitation requires System execution privileges, needs no user interaction, and has no reported integrity or availability impact.

The record

CVE
CVE-2022-20066
Published
Apr 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-755
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 11, 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

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/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-755Improper Handling of Exceptional Conditions

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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