SB2026070128 - Multiple vulnerabilities in MediaTek chipsets (July 2026)

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Main Vulnerability Database SB2026070128

SB2026070128 - Multiple vulnerabilities in MediaTek chipsets (July 2026)

Published: July 1, 2026

Security Bulletin ID SB2026070128
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 7
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 7 vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2026-20457)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in the modem when processing input. A local user can send crafted input to cause a denial of service.


2) Out-of-bounds write (CVE-ID: CVE-2026-20458)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to out-of-bounds write in the modem when processing input. A local user can send crafted input to cause memory corruption.


3) Authentication bypass using an alternate path or channel (CVE-ID: CVE-2026-20459)

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to authentication bypass using an alternate path or channel in the modem when processing input. A local user can use an alternate path or channel to cause a denial of service.


4) Authentication bypass using an alternate path or channel (CVE-ID: CVE-2026-20460)

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to authentication bypass using an alternate path or channel in the modem when processing input. A local user can use an alternate path or channel to disclose sensitive information.


5) Out-of-bounds write (CVE-ID: CVE-2026-20461)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to out-of-bounds write in the modem when processing input. A local user can send crafted input to cause memory corruption.


6) Heap-based buffer overflow (CVE-ID: CVE-2026-20462)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to heap-based buffer overflow in the telephony component when processing input. A local user can send crafted input to cause memory corruption.


7) Improper Handling of Insufficient Permissions or Privileges (CVE-ID: CVE-2026-20463)

CWE-ID: CWE-280 - Improper Handling of Insufficient Permissions or Privileges

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper handling of insufficient permissions or privileges in the modem when enforcing permissions. A local user can bypass permissions to escalate privileges.


Remediation

Install update from vendor's website.

References