Medium severity · published Apr 7, 2026
CVE-2026-20446
In sec boot, there is a possible out of bounds write due to an integer overflow
4.3
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Physical
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
MediaTek chipset · MediaTek, Inc.
MT6813 · source: vendor
MF
Mt6813 Firmware · Mediatek
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20446
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20446
Vendor Advisory
https://corp.mediatek.com/product-security-bulletin/April-2026
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