CVE-2026-20530: mt2718 Memory Corruption — Fix

Description

In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11292777; Issue ID: MSV-9195.

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CVSS v3.1 Score

6.7

MEDIUM

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

EPSS — Exploit Prediction

0.0011

Probability of exploitation

0.01%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
mediatek	mt2718_firmware	All
mediatek	mt2718	All
mediatek	mt6991_firmware	All
mediatek	mt6991	All
mediatek	mt6993_firmware	All
mediatek	mt6993	All
mediatek	mt8126_firmware	All
mediatek	mt8126	All
mediatek	mt8171_firmware	All
mediatek	mt8171	All
mediatek	mt8188_firmware	All
mediatek	mt8188	All
mediatek	mt8189_firmware	All
mediatek	mt8189	All
mediatek	mt8196_firmware	All
mediatek	mt8196	All
mediatek	mt8668_firmware	All
mediatek	mt8668	All
mediatek	mt8678_firmware	All
mediatek	mt8678	All
mediatek	mt8793_firmware	All
mediatek	mt8793	All

References

Advisories & Patches

https://www.mediatek.com/product-security-bulletin/October-2026

Frequently Asked Questions

What is CVE-2026-20530? +

In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11292777; Issue ID: MSV-9195. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2026-20530? +

CVE-2026-20530 has a CVSS v3.1 score of 6.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0011, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-20530? +

CVE-2026-20530 affects products from mediatek, specifically: mt2718, mt2718_firmware, mt6991, mt6991_firmware, mt6993, mt6993_firmware, mt8126, mt8126_firmware, mt8171, mt8171_firmware, mt8188, mt8188_firmware, mt8189, mt8189_firmware, mt8196, mt8196_firmware, mt8668, mt8668_firmware, mt8678, mt8678_firmware, mt8793, mt8793_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-20530? +

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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