Local privilege escalation via unchecked HFRP write
Published Aug 3, 2026 · Updated Aug 3, 2026
Out-of-bounds write in HFRP on MediaTek MT6993 chipsets allows local users with System privilege to escalate privileges. HFRP writes beyond a buffer because it fails to verify an unspecified input against the destination bounds; MediaTek has not disclosed the affected routine or input. Exploitation requires prior System privilege and no user interaction, and the published impact is limited to additional local privilege.
Summary
What happened
Out-of-bounds write in HFRP on MediaTek MT6993 chipsets allows local users with System privilege to escalate privileges. HFRP writes beyond a buffer because it fails to verify an unspecified input against the destination bounds; MediaTek has not disclosed the affected routine or input. Exploitation requires prior System privilege and no user interaction, and the published impact is limited to additional local privilege.
The record
- CVE
- CVE-2026-20485
- Published
- Aug 3, 2026
- Updated
- Aug 3, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-787, T1404
- 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?
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- Affected versionversion=MT6993
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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