CVE-2026-20446 — MEDIUM (4.3)

Vulnerability Description

In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS09963054; Issue ID: MSV-3899.

CVSS Score

4.3

MEDIUM

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

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mediatek	Mt6813 Firmware	-
Mediatek	Mt6813	-

Related Weaknesses (CWE)

CWE-190 CWE-787

References

https://corp.mediatek.com/product-security-bulletin/April-2026Vendor Advisory

FAQ

What is CVE-2026-20446?

CVE-2026-20446 is a vulnerability with a CVSS score of 4.3 (MEDIUM). In sec boot, there is a possible out of bounds write due to an integer overflow. This could lead to local denial of service, if an attacker has physical access to the device, with User execution privi...

How severe is CVE-2026-20446?

CVE-2026-20446 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20446?

Check the references section above for vendor advisories and patch information. Affected products include: Mediatek Mt6813 Firmware, Mediatek Mt6813.