Buffer overflow in Mediatek, Inc. Mediatek Chipset
CVE-2026-20493
In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Pat…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mediatek, Inc. Mediatek Chipset — versions MT6890, MT6988, MT6990
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20493?
- CVE-2026-20493 is a medium-severity vulnerability in Mediatek, Inc. Mediatek Chipset, classified under Out-of-bounds Write. CVSS score: 4.4/10. Published 2026-08-03.
- How severe is CVE-2026-20493?
- Medium severity. CVSS v3 base score is 4.4 out of 10.