CVE-2025-20712: mt6990 Heap Overflow — Fix

Description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00422323; Issue ID: MSV-3810.

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CVSS v3.1 Score

8.8

HIGH

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

Weakness Type (CWE)

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
mediatek	software_development_kit	< 8.3.1.1
mediatek	mt6990	All
mediatek	mt7990	All
mediatek	mt7991	All
mediatek	mt7992	All
mediatek	mt7993	All
openwrt	openwrt	All
openwrt	openwrt	All
mediatek	mt6990	All

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-20712? +

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00422323; Issue ID: MSV-3810. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-20712? +

CVE-2025-20712 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-20712? +

CVE-2025-20712 affects products from mediatek, openwrt, specifically: mt6990, mt7990, mt7991, mt7992, mt7993, openwrt, software_development_kit. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20712? +

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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