VulnerabilityDeferred

CVE-2026-20466

In sec boot, there is a possible escalation of privilege due to a heap buffer overflow.

MEDIUM 6.1EPSS 0.17%

Does this matter?

Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.

Description

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. User interaction is not needed for exploitation. Patch ID: AUTO00845351 (Note: For MT2737) / ALPS11072643 (Note: For MT6880, MT6890, MT6990); Issue ID: MSV-6929.

CVSS 3.1: 6.1 MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.17% probability · 6th percentile
CISA KEV: Not listed
Weakness: CWE-787
Source: security@mediatek.com

References

https://www.mediatek.com/product-security-bulletin/August-2026

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.