CVE-2026-20546
Received Received - Intake

Out-of-Bounds Write in Modem

Publication date: 2026-11-02

Last updated on: 2026-11-02

Assigner: MediaTek, Inc.

Description
In Modem, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote escalation of privilege, 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: MOLY01876654 / MOLY01774038; Issue ID: MSV-9803.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-02
Last Modified
2026-11-02
Generated
2026-11-02
AI Q&A
2026-11-02
EPSS Evaluated
N/A
NVD
CVE-2026-20546

Affected Vendors & Products

Showing 77 associated CPEs
Vendor Product Version / Range
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
MediaTek, Inc. MediaTek chipset MT6769
MediaTek, Inc. MediaTek chipset MT6771
MediaTek, Inc. MediaTek chipset MT6779
MediaTek, Inc. MediaTek chipset MT6781
MediaTek, Inc. MediaTek chipset MT6783
MediaTek, Inc. MediaTek chipset MT6785
MediaTek, Inc. MediaTek chipset MT6789
MediaTek, Inc. MediaTek chipset MT6813
MediaTek, Inc. MediaTek chipset MT6815
MediaTek, Inc. MediaTek chipset MT6833
MediaTek, Inc. MediaTek chipset MT6835
MediaTek, Inc. MediaTek chipset MT6853
MediaTek, Inc. MediaTek chipset MT6855
MediaTek, Inc. MediaTek chipset MT6858
MediaTek, Inc. MediaTek chipset MT6873
MediaTek, Inc. MediaTek chipset MT6875
MediaTek, Inc. MediaTek chipset MT6877
MediaTek, Inc. MediaTek chipset MT6878
MediaTek, Inc. MediaTek chipset MT6879
MediaTek, Inc. MediaTek chipset MT6880
MediaTek, Inc. MediaTek chipset MT6881
MediaTek, Inc. MediaTek chipset MT6883
MediaTek, Inc. MediaTek chipset MT6885
MediaTek, Inc. MediaTek chipset MT6886
MediaTek, Inc. MediaTek chipset MT6889
MediaTek, Inc. MediaTek chipset MT6890
MediaTek, Inc. MediaTek chipset MT6891
MediaTek, Inc. MediaTek chipset MT6893
MediaTek, Inc. MediaTek chipset MT6895
MediaTek, Inc. MediaTek chipset MT6896
MediaTek, Inc. MediaTek chipset MT6897
MediaTek, Inc. MediaTek chipset MT6899
MediaTek, Inc. MediaTek chipset MT6980
MediaTek, Inc. MediaTek chipset MT6982
MediaTek, Inc. MediaTek chipset MT6983
MediaTek, Inc. MediaTek chipset MT6985
MediaTek, Inc. MediaTek chipset MT6986
MediaTek, Inc. MediaTek chipset MT6988
MediaTek, Inc. MediaTek chipset MT6989
MediaTek, Inc. MediaTek chipset MT6990
MediaTek, Inc. MediaTek chipset MT6991
MediaTek, Inc. MediaTek chipset MT6993
MediaTek, Inc. MediaTek chipset MT8668
MediaTek, Inc. MediaTek chipset MT8676
MediaTek, Inc. MediaTek chipset MT8678
MediaTek, Inc. MediaTek chipset MT8755
MediaTek, Inc. MediaTek chipset MT8765
MediaTek, Inc. MediaTek chipset MT8766
MediaTek, Inc. MediaTek chipset MT8766R
MediaTek, Inc. MediaTek chipset MT8768
MediaTek, Inc. MediaTek chipset MT8771
MediaTek, Inc. MediaTek chipset MT8775
MediaTek, Inc. MediaTek chipset MT8781
MediaTek, Inc. MediaTek chipset MT8786
MediaTek, Inc. MediaTek chipset MT8788E
MediaTek, Inc. MediaTek chipset MT8791
MediaTek, Inc. MediaTek chipset MT8791T
MediaTek, Inc. MediaTek chipset MT8792
MediaTek, Inc. MediaTek chipset MT8793
MediaTek, Inc. MediaTek chipset MT8796
MediaTek, Inc. MediaTek chipset MT8797
MediaTek, Inc. MediaTek chipset MT8798
MediaTek, Inc. MediaTek chipset MT8863
MediaTek, Inc. MediaTek chipset MT8873
MediaTek, Inc. MediaTek chipset MT8875
MediaTek, Inc. MediaTek chipset MT8883
MediaTek, Inc. MediaTek chipset MT8893

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an out of bounds write in Modem due to incorrect bounds checking. It allows remote privilege escalation if a user equipment connects to a malicious base station controlled by an attacker. No user interaction or additional privileges are required for exploitation.

Impact Analysis

An attacker could exploit this to gain elevated privileges on your device by tricking it into connecting to a rogue base station. This could lead to unauthorized access, data theft, or further compromise of your device.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. However, the vulnerability's potential for remote privilege escalation and memory corruption could lead to unauthorized access to sensitive data, which may violate data protection requirements under GDPR (e.g., Article 32) and HIPAA (e.g., Security Rule). Organizations using affected MediaTek chipsets should assess their exposure to determine compliance risks.

Mitigation Strategies

Apply the provided patches (MOLY01876654 or MOLY01774038) to address the incorrect bounds check in Modem. Ensure all MediaTek chipsets are updated to the latest firmware versions to prevent remote escalation of privilege via rogue base stations.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-20546. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...