Buffer overflow in Mediatek, Inc. Mediatek Chipset
CVE-2026-20466
In sec boot, there is a possible escalation of privilege due to a heap buffer overflow. This could lead to local escalation of privilege, if an attacker has physical access to the device, with no additional execution privileges needed. Use…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Mediatek, Inc. Mediatek Chipset — versions MT2737, MT6880, MT6890
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20466?
- CVE-2026-20466 is a medium-severity vulnerability in Mediatek, Inc. Mediatek Chipset, classified under Out-of-bounds Write. CVSS score: 6.1/10. Published 2026-08-03.
- How severe is CVE-2026-20466?
- Medium severity. CVSS v3 base score is 6.1 out of 10.