Vulnerability Monitor

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CVE-2026-20520


In Modem, there is a possible out of bounds write due to a missing 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: MOLY01778988; Issue ID: MSV-8897.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it requires adjacent network access but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 114 products from mediatek, from mediatek, from mediatek and 111 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2026-10-05T02:16:50.540

Last Modified

2026-10-08T14:32:52.177

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses
  • Type: Secondary
    CWE-787

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System mediatek mt2716_firmware - Yes
Hardware mediatek mt2716 - No
Operating System mediatek mt2735_firmware - Yes
Hardware mediatek mt2735 - No
Operating System mediatek mt2737_firmware - Yes
Hardware mediatek mt2737 - No
Operating System mediatek mt6813_firmware - Yes
Hardware mediatek mt6813 - No
Operating System mediatek mt6815_firmware - Yes
Hardware mediatek mt6815 - No
Operating System mediatek mt6833_firmware - Yes
Hardware mediatek mt6833 - No
Operating System mediatek mt6835_firmware - Yes
Hardware mediatek mt6835 - No
Operating System mediatek mt6853_firmware - Yes
Hardware mediatek mt6853 - No
Operating System mediatek mt6855_firmware - Yes
Hardware mediatek mt6855 - No
Operating System mediatek mt6858_firmware - Yes
Hardware mediatek mt6858 - No
Operating System mediatek mt6873_firmware - Yes
Hardware mediatek mt6873 - No
Operating System mediatek mt6875_firmware - Yes
Hardware mediatek mt6875 - No
Operating System mediatek mt6877_firmware - Yes
Hardware mediatek mt6877 - No
Operating System mediatek mt6878_firmware - Yes
Hardware mediatek mt6878 - No
Operating System mediatek mt6879_firmware - Yes
Hardware mediatek mt6879 - No
Operating System mediatek mt6880_firmware - Yes
Hardware mediatek mt6880 - No
Operating System mediatek mt6881_firmware - Yes
Hardware mediatek mt6881 - No
Operating System mediatek mt6883_firmware - Yes
Hardware mediatek mt6883 - No
Operating System mediatek mt6885_firmware - Yes
Hardware mediatek mt6885 - No
Operating System mediatek mt6886_firmware - Yes
Hardware mediatek mt6886 - No
Operating System mediatek mt6889_firmware - Yes
Hardware mediatek mt6889 - No
Operating System mediatek mt6890_firmware - Yes
Hardware mediatek mt6890 - No
Operating System mediatek mt6891_firmware - Yes
Hardware mediatek mt6891 - No
Operating System mediatek mt6893_firmware - Yes
Hardware mediatek mt6893 - No
Operating System mediatek mt6895_firmware - Yes
Hardware mediatek mt6895 - No
Operating System mediatek mt6896_firmware - Yes
Hardware mediatek mt6896 - No
Operating System mediatek mt6897_firmware - Yes
Hardware mediatek mt6897 - No
Operating System mediatek mt6899_firmware - Yes
Hardware mediatek mt6899 - No
Operating System mediatek mt6980_firmware - Yes
Hardware mediatek mt6980 - No
Operating System mediatek mt6982_firmware - Yes
Hardware mediatek mt6982 - No
Operating System mediatek mt6983_firmware - Yes
Hardware mediatek mt6983 - No
Operating System mediatek mt6985_firmware - Yes
Hardware mediatek mt6985 - No
Operating System mediatek mt6986_firmware - Yes
Hardware mediatek mt6986 - No
Operating System mediatek mt6988_firmware - Yes
Hardware mediatek mt6988 - No
Operating System mediatek mt6989_firmware - Yes
Hardware mediatek mt6989 - No
Operating System mediatek mt6990_firmware - Yes
Hardware mediatek mt6990 - No
Operating System mediatek mt6991_firmware - Yes
Hardware mediatek mt6991 - No
Operating System mediatek mt6993_firmware - Yes
Hardware mediatek mt6993 - No
Operating System mediatek mt8668_firmware - Yes
Hardware mediatek mt8668 - No
Operating System mediatek mt8676_firmware - Yes
Hardware mediatek mt8676 - No
Operating System mediatek mt8678_firmware - Yes
Hardware mediatek mt8678 - No
Operating System mediatek mt8755_firmware - Yes
Hardware mediatek mt8755 - No
Operating System mediatek mt8771_firmware - Yes
Hardware mediatek mt8771 - No
Operating System mediatek mt8775_firmware - Yes
Hardware mediatek mt8775 - No
Operating System mediatek mt8791_firmware - Yes
Hardware mediatek mt8791 - No
Operating System mediatek mt8791t_firmware - Yes
Hardware mediatek mt8791t - No
Operating System mediatek mt8792_firmware - Yes
Hardware mediatek mt8792 - No
Operating System mediatek mt8793_firmware - Yes
Hardware mediatek mt8793 - No
Operating System mediatek mt8796_firmware - Yes
Hardware mediatek mt8796 - No
Operating System mediatek mt8797_firmware - Yes
Hardware mediatek mt8797 - No
Operating System mediatek mt8798_firmware - Yes
Hardware mediatek mt8798 - No
Operating System mediatek mt8863_firmware - Yes
Hardware mediatek mt8863 - No
Operating System mediatek mt8873_firmware - Yes
Hardware mediatek mt8873 - No
Operating System mediatek mt8883_firmware - Yes
Hardware mediatek mt8883 - No
Operating System mediatek mt8893_firmware - Yes
Hardware mediatek mt8893 - No
Operating System mediatek mt8695_firmware - Yes
Hardware mediatek mt8695 - No
Operating System mediatek mt8696_firmware - Yes
Hardware mediatek mt8696 - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For mediatek's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.