Out of Bounds Write Vulnerability in Mediatek Modem
CVE-2026-20434

7.5HIGH

Key Information:

Vendor

MediaTek
Status
Mediatek Chipset
Vendor
CVE Published:
2 March 2026

What is CVE-2026-20434?

A potential vulnerability has been identified in the Mediatek modem that allows for an out of bounds write due to a missing bounds check. If a user equipment (UE) connects to a rogue base station controlled by an attacker, this vulnerability may be exploited to escalate privileges remotely. While user interaction is necessary for the attack to occur, this flaw can pose a significant security threat if not promptly addressed. The recommended patch ID for remediation is MOLY00782946.

Affected Version(s)

MediaTek chipset MT2735

MediaTek chipset MT2737

MediaTek chipset MT6739

References

https://corp.mediatek.com/product-security-bulletin/March...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.