#VU105188 Out-of-bounds write in MediaTek products - CVE-2025-20646

Vulnerability identifier: #VU105188

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-20646

CWE-ID: CWE-787

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MT6890
Mobile applications / Mobile firmware & hardware
MT7915
Mobile applications / Mobile firmware & hardware
MT7916
Mobile applications / Mobile firmware & hardware
MT7981
Mobile applications / Mobile firmware & hardware
MT7986
Mobile applications / Mobile firmware & hardware

Vendor: MediaTek

Description

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to improper input validation within wlan. A local application can execute arbitrary code.

Mitigation
Install security update from vendor's website.

Vulnerable software versions

MT6890: All versions

MT7915: All versions

MT7916: All versions

MT7981: All versions

MT7986: All versions

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External links
https://corp.mediatek.com/product-security-bulletin/March-2025

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.