CVE-2026-20493

MEDIUM CVSS 3.1: 4.4 EPSS 0.10%
Updated Aug 19, 2026
Mediatek
Parameter Value
CVSS 4.4 (MEDIUM)
Type CWE-787 (Out-of-bounds Write)
Vendor Mediatek
Public PoC No

In wifi, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation.

Patch ID: BORA00154903; Issue ID: MSV-7575.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 6

Configuration From (including) Up to (excluding)
Mediatek Mt6890_Firmware
cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*
Mediatek Mt6890
cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*
Mediatek Mt6988_Firmware
cpe:2.3:o:mediatek:mt6988_firmware:-:*:*:*:*:*:*:*
Mediatek Mt6988
cpe:2.3:h:mediatek:mt6988:-:*:*:*:*:*:*:*
Mediatek Mt6990_Firmware
cpe:2.3:o:mediatek:mt6990_firmware:-:*:*:*:*:*:*:*
Mediatek Mt6990
cpe:2.3:h:mediatek:mt6990:-:*:*:*:*:*:*:*