CVE-2026-20529

MEDIUM
Published Oct 5, 2026 Modified Oct 9, 2026 CWE-787

Description

In battery, 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: ALPS11276677; Issue ID: MSV-9217.

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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
mediatek mt6761_firmware
mediatek mt6761
mediatek mt6765_firmware
mediatek mt6765
mediatek mt6768_firmware
mediatek mt6768
mediatek mt6781_firmware
mediatek mt6781
mediatek mt6853_firmware
mediatek mt6853
mediatek mt6858_firmware
mediatek mt6858
mediatek mt6881_firmware
mediatek mt6881
mediatek mt6893_firmware
mediatek mt6893
mediatek mt6989_firmware
mediatek mt6989
mediatek mt6991_firmware
mediatek mt6991
mediatek mt6993_firmware
mediatek mt6993
mediatek mt8171_firmware
mediatek mt8171
mediatek mt8186_firmware
mediatek mt8186
mediatek mt8188_firmware
mediatek mt8188
mediatek mt8189_firmware
mediatek mt8189
mediatek mt8196_firmware
mediatek mt8196
mediatek mt8766_firmware
mediatek mt8766
mediatek mt8768_firmware
mediatek mt8768
mediatek mt8775_firmware
mediatek mt8775
mediatek mt8781_firmware
mediatek mt8781
mediatek mt8788e_firmware
mediatek mt8788e
mediatek mt8791t_firmware
mediatek mt8791t
mediatek mt8792_firmware
mediatek mt8792
mediatek mt8796_firmware
mediatek mt8796
mediatek mt8799_firmware
mediatek mt8799
mediatek mt8883_firmware
mediatek mt8883
mediatek mt8893_firmware
mediatek mt8893
mediatek mt8910_firmware
mediatek mt8910

References

Frequently Asked Questions

What is CVE-2026-20529? +
In battery, 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: ALPS11276677; Issue ID: MSV-9217. It has a CVSS v3.1 base score of 6.7 (MEDIUM).
How severe is CVE-2026-20529? +
CVE-2026-20529 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-2026-20529? +
CVE-2026-20529 affects products from mediatek, specifically: mt6761, mt6761_firmware, mt6765, mt6765_firmware, mt6768, mt6768_firmware, mt6781, mt6781_firmware, mt6853, mt6853_firmware, mt6858, mt6858_firmware, mt6881, mt6881_firmware, mt6893, mt6893_firmware, mt6989, mt6989_firmware, mt6991, mt6991_firmware, mt6993, mt6993_firmware, mt8171, mt8171_firmware, mt8186, mt8186_firmware, mt8188, mt8188_firmware, mt8189, mt8189_firmware, mt8196, mt8196_firmware, mt8766, mt8766_firmware, mt8768, mt8768_firmware, mt8775, mt8775_firmware, mt8781, mt8781_firmware, mt8788e, mt8788e_firmware, mt8791t, mt8791t_firmware, mt8792, mt8792_firmware, mt8796, mt8796_firmware, mt8799, mt8799_firmware, mt8883, mt8883_firmware, mt8893, mt8893_firmware, mt8910, mt8910_firmware. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-20529? +
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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