CVE-2026-20449

MEDIUM

MediaTek chipset - Remote Denial of Service via Heap Buffer Overflow in Modem

Title source: llm

Description

In Modem, there is a possible system crash due to a heap buffer overflow. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01760138; Issue ID: MSV-6148.

References (1)

Core 1

Core References

https://corp.mediatek.com/product-security-bulletin/May-2026

Scores

CVSS v3 6.5

EPSS 0.0003

EPSS Percentile 8.7%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-120

Status published

Products (50)

mediatek/mt2735_firmware

mediatek/mt2737_firmware

mediatek/mt6739_firmware

mediatek/mt6761_firmware

mediatek/mt6762_firmware

mediatek/mt6763_firmware

mediatek/mt6765_firmware

mediatek/mt6767_firmware

mediatek/mt6768_firmware

mediatek/mt6769_firmware

... and 40 more

Published May 04, 2026

Tracked Since May 04, 2026