CVE-2025-20751: nr15 Memory Corruption — Fix

Description

In Modem, there is a possible system crash due to a missing bounds check. 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: MOLY01661195; Issue ID: MSV-4297.

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CVSS v3.1 Score

6.5

MEDIUM

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

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
mediatek	nr15	All
mediatek	mt2735	All
mediatek	mt6833	All
mediatek	mt6833p	All
mediatek	mt6853	All
mediatek	mt6853t	All
mediatek	mt6855	All
mediatek	mt6855t	All
mediatek	mt6873	All
mediatek	mt6875	All
mediatek	mt6875t	All
mediatek	mt6877	All
mediatek	mt6877t	All
mediatek	mt6877tt	All
mediatek	mt6880	All
mediatek	mt6883	All
mediatek	mt6885	All
mediatek	mt6889	All
mediatek	mt6890	All
mediatek	mt6891	All
mediatek	mt6893	All
mediatek	mt8675	All
mediatek	mt8771	All
mediatek	mt8791	All
mediatek	mt8791t	All
mediatek	mt8797	All

References

Advisories & Patches

https://corp.mediatek.com/product-security-bulletin/December-2025

Frequently Asked Questions

What is CVE-2025-20751? +

In Modem, there is a possible system crash due to a missing bounds check. 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: MOLY01661195; Issue ID: MSV-4297. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-20751? +

CVE-2025-20751 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20751? +

CVE-2025-20751 affects products from mediatek, specifically: mt2735, mt6833, mt6833p, mt6853, mt6853t, mt6855, mt6855t, mt6873, mt6875, mt6875t, mt6877, mt6877t, mt6877tt, mt6880, mt6883, mt6885, mt6889, mt6890, mt6891, mt6893, mt8675, mt8771, mt8791, mt8791t, mt8797, nr15. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20751? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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