Local information disclosure via missing TFA permission check
Published Aug 3, 2026 · Updated Aug 3, 2026
Information disclosure in TFA on affected MediaTek chipsets allows local users with System privilege to read sensitive data. The TFA component sends sensitive information without enforcing the required permission check; MediaTek has not disclosed the affected interface or data fields. Exploitation requires prior System privilege and no user interaction, and the published impact is limited to confidentiality.
Summary
What happened
Information disclosure in TFA on affected MediaTek chipsets allows local users with System privilege to read sensitive data. The TFA component sends sensitive information without enforcing the required permission check; MediaTek has not disclosed the affected interface or data fields. Exploitation requires prior System privilege and no user interaction, and the published impact is limited to confidentiality.
The record
- CVE
- CVE-2026-20484
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-201
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Aug 3, 2026CVE publishedPublication date reported by the CVE source.
- Aug 3, 2026Record 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.
- Affected versionversion=MT6739
- Affected versionversion=MT6761
- Affected versionversion=MT6765
- Affected versionversion=MT6768
- Affected versionversion=MT6781
- Affected versionversion=MT6789
- Affected versionversion=MT6833
- Affected versionversion=MT6835
- Affected versionversion=MT6853
- Affected versionversion=MT6855
- Affected versionversion=MT6877
- Affected versionversion=MT6878
- Affected versionversion=MT6879
- Affected versionversion=MT6883
- Affected versionversion=MT6885
- Affected versionversion=MT6886
- Affected versionversion=MT6889
- Affected versionversion=MT6893
- Affected versionversion=MT6895
- Affected versionversion=MT6897
- Affected versionversion=MT6899
- Affected versionversion=MT6983
- Affected versionversion=MT6985
- Affected versionversion=MT6988
- Affected versionversion=MT6989
- Affected versionversion=MT6991
- Affected versionversion=MT6993
- Affected versionversion=MT8171
- Affected versionversion=MT8188
- Affected versionversion=MT8189
- Affected versionversion=MT8390
- Affected versionversion=MT8391
- Affected versionversion=MT8668
- Affected versionversion=MT8676
- Affected versionversion=MT8678
- Affected versionversion=MT8696
- Affected versionversion=MT8792
- Affected versionversion=MT8793
- Affected versionversion=MT8799
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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