CVE-2026-20459

MEDIUM

MediaTek Chipset - Authentication Bypass Using an Alternate Path or Channel

Title source: rule
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-20459. PoCs published by HermesNA-1.

AI-analyzed exploit summary This repository contains an auto-generated stub module for CVE-2026-20459, a denial-of-service vulnerability in MediaTek modem firmware due to improper input validation. The code includes placeholder methods (`check` and `run`) but lacks actual exploit logic or technical details about the vulnerability.

Description

In Modem, there is a possible system crash due to improper input validation. 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: MOLY01816800; Issue ID: MSV-6842.

Exploits (1)

github STUB 1 stars
by HermesNA-1 · pythonpoc
https://github.com/HermesNA-1/SnakeSploit/tree/main/data/modules_generated/cve-2026-20459_modem_there.py

This repository contains an auto-generated stub module for CVE-2026-20459, a denial-of-service vulnerability in MediaTek modem firmware due to improper input validation. The code includes placeholder methods (`check` and `run`) but lacks actual exploit logic or technical details about the vulnerability.

Classification
Stub 99%
Attack Type
Dos
Complexity
Complex
Reliability
Theoretical
Target: MediaTek modem firmware (unspecified version)
No auth needed
Prerequisites: Target device must connect to a rogue base station controlled by the attacker · Attacker must have knowledge of the specific input validation flaw (not provided in the code)
mistral-large-3 · analyzed Jul 09, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 5.3
EPSS 0.0017
EPSS Percentile 6.5%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:H/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-288
Status published
Products (50)
MediaTek, Inc./MediaTek chipset MT2716
MediaTek, Inc./MediaTek chipset MT2735
MediaTek, Inc./MediaTek chipset MT2737
MediaTek, Inc./MediaTek chipset MT6739
MediaTek, Inc./MediaTek chipset MT6761
MediaTek, Inc./MediaTek chipset MT6762
MediaTek, Inc./MediaTek chipset MT6763
MediaTek, Inc./MediaTek chipset MT6765
MediaTek, Inc./MediaTek chipset MT6767
MediaTek, Inc./MediaTek chipset MT6768
... and 40 more
Published Jul 01, 2026
Tracked Since Jul 01, 2026