EUVD-2026-33544
GHSA-jf3x-c8h2-5gjj
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (MediaTek) · only source for this CVE.
CVSS VectorVendor: MediaTek
Lifecycle Timeline
3DescriptionCVE.org
In geniezone, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10873936; Issue ID: MSV-6784.
AnalysisAI
Local privilege escalation in MediaTek GenieZone (trusted execution environment) allows an attacker who has already gained System-level privileges on an affected device to write out-of-bounds memory and escalate further on the chipset. The flaw affects a broad range of MediaTek chipsets used in mobile and embedded devices, with no public exploit identified at time of analysis. CVSS is 7.8 (High) reflecting the high integrity, confidentiality, and availability impact despite the local attack vector.
Technical ContextAI
GenieZone is MediaTek's proprietary Trusted Execution Environment (TEE) hypervisor, isolating sensitive workloads (DRM, key storage, biometrics) from the Android Rich Execution Environment. The root cause is CWE-787 (Out-of-bounds Write) caused by a missing bounds check in a GenieZone code path reachable from a privileged caller. Because GenieZone runs at a higher privilege boundary than the Android OS, corrupting its memory can break the security guarantees the TEE provides to the rest of the system. The affected CPE is cpe:2.3:a:mediatek,_inc.:mediatek_chipset, spanning dozens of MT6xxx/MT8xxx SoCs (e.g. MT6991, MT8798, MT6989) used in Android phones and tablets.
RemediationAI
Apply the MediaTek-supplied fix tracked as Patch ID ALPS10873936 (Issue ID MSV-6784) as integrated by your device OEM in the June 2026 Android security level or later vendor firmware update - see https://corp.mediatek.com/product-security-bulletin/June-2026. Because TEE fixes ship through the device manufacturer's firmware/OTA pipeline rather than directly from MediaTek, end users and fleet operators should track their OEM's security bulletin (Samsung, Xiaomi, Oppo, etc.) and force-install the corresponding monthly patch. As a compensating control until firmware is available, restrict the ability of apps to attain System privilege by enforcing strict MDM-controlled app allow-listing, disabling sideloading, and removing unnecessary privileged system apps; note this only reduces the attack surface that could reach the GenieZone interface and does not remove the vulnerability itself.
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today