CVE-2026-20466 — MEDIUM (6.1)

Vulnerability 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 Score

6.1

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Related Weaknesses (CWE)

CWE-787

References

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

FAQ

What is CVE-2026-20466?

CVE-2026-20466 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 addi...

How severe is CVE-2026-20466?

CVE-2026-20466 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20466?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.