Local privilege escalation via unchecked geniezone write
Published Jun 1, 2026 · Updated Jun 1, 2026
Out-of-bounds write in geniezone on affected MediaTek chipsets allows local users with System privilege to escalate privileges. MediaTek identifies a missing bounds check in geniezone but does not disclose the affected function, input, or write operation. The attacker must already hold System privilege; no user interaction is required, and successful exploitation elevates local privileges.
Summary
What happened
Out-of-bounds write in geniezone on affected MediaTek chipsets allows local users with System privilege to escalate privileges. MediaTek identifies a missing bounds check in geniezone but does not disclose the affected function, input, or write operation. The attacker must already hold System privilege; no user interaction is required, and successful exploitation elevates local privileges.
The record
- CVE
- CVE-2026-20453
- Published
- Jun 1, 2026
- Updated
- Jun 1, 2026
- Vendor
- MediaTek
- Product
- MediaTek Chipset
- Classifications
- CWE-787, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 1, 2026CVE publishedPublication date reported by the CVE source.
- Jun 1, 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=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=MT6989
- Affected versionversion=MT6991
- Affected versionversion=MT8673
- Affected versionversion=MT8765
- Affected versionversion=MT8766
- Affected versionversion=MT8768
- Affected versionversion=MT8781
- Affected versionversion=MT8786
- Affected versionversion=MT8788
- Affected versionversion=MT8791T
- Affected versionversion=MT8793
- Affected versionversion=MT8797
- Affected versionversion=MT8798
- Affected versionversion=MT8910
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.
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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