In KeyInstall, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a…
cve CVE-2025-20795 1 source, 1 claim · Watch
NVD writes:
In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141. the claim
In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141. the claim
- Severity
- HIGH NVD
- CVSS
- 7.8 NVD
- Vendor
- MediaTek, Inc. NVD
- Product
- MediaTek chipset NVD
- CWE
- CWE-787 NVD
How far exploitation has got
- No public code known
- Proof of concept
- Proof of concept, verified
- A Metasploit module
- Exploited in the wild
- Used in ransomware campaigns
Timeline
| 2026-01-06 | first spoke of it: In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141. | NVD |
In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141.
What it is to other things
In words only, so not counted until a person confirms one:
| made_by | mediatek_incNVD says “MediaTek, Inc.” |
| affects | mediatek_inc/mediatek_chipsetNVD says “MediaTek, Inc. · MediaTek chipset” |
Every value, with what each source said and its receipt
| Property | Source | Said | Means here | ||||
|---|---|---|---|---|---|---|---|
| Automatable automatable | NVD | no At least one of those steps needs a person. receipt
What the source handed over{
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"value": "In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141."
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"role": "CISA Coordinator",
"timestamp": "2026-01-07T04:55:46.691465Z",
"version": "2.0.3"
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"references": [
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"tags": [
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"url": "https://corp.mediatek.com/product-security-bulletin/January-2026"
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"sourceIdentifier": "security@mediatek.com",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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"value": "CWE-787"
}
],
"source": "security@mediatek.com",
"type": "Secondary"
}
]
}
} | — | ||||
| CVSS cvss | NVD | 7.8receipt
What the source handed over{
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} | — | ||||
| CVSS vector cvss_vector | NVD | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hreceipt
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} | — | ||||
| CWE cwe | NVD | CWE-787receipt
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} | — | ||||
| Exploitation exploitation | NVD | none No evidence of exploitation, and no public proof of concept. receipt
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} | — | ||||
| Product product | NVD | MediaTek chipsetreceipt
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"value": "In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141."
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}
} | — | ||||
| Severity severity | NVD | HIGH From 7.0 to 8.9. receipt
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}
]
}
} | — | ||||
| Technical impact technical_impact | NVD | total The attacker gains full control of the component, or all of its information. receipt
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]
}
} | — | ||||
| Vendor vendor | NVD | MediaTek, Inc.receipt
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"value": "In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141."
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"timestamp": "2026-01-07T04:55:46.691465Z",
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]
}
} | — |
Every claim, by kind
vulnerability
| In KeyInstall, 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: ALPS10276761; Issue ID: MSV-5141. zetlyn/cve-nvd · 2026-01-06 | automatable no cvss 7.8 cvss_vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H cwe CWE-787 exploitation none product MediaTek chipset severity HIGH status Analyzed technical_impact total vendor MediaTek, Inc. | source |