CVE-2026-20456

MEDIUM CVSS 3.1: 5.5 EPSS 0.10%
Updated Jul 22, 2026
Mediatek
Parameter Value
CVSS 5.5 (MEDIUM)
Type CWE-787 (Out-of-bounds Write)
Vendor Mediatek
Public PoC No

In wlan STA driver, there is a possible system crash due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation.

Patch ID: WCNCR00480851; Issue ID: MSV-6338.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic 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 12

Configuration From (including) Up to (excluding)
Mediatek Mt7902_Firmware
cpe:2.3:o:mediatek:mt7902_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7902
cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:*
Mediatek Mt7920_Firmware
cpe:2.3:o:mediatek:mt7920_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7920
cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:*
Mediatek Mt7921_Firmware
cpe:2.3:o:mediatek:mt7921_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7921
cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:*
Mediatek Mt7922_Firmware
cpe:2.3:o:mediatek:mt7922_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7922
cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:*
Mediatek Mt7925_Firmware
cpe:2.3:o:mediatek:mt7925_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7925
cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:*
Mediatek Mt7927_Firmware
cpe:2.3:o:mediatek:mt7927_firmware:-:*:*:*:*:*:*:*
Mediatek Mt7927
cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:*