# CVE-2026-20564: CVE-2026-20564

Status: published. Published: 2026-11-02. Updated: 2026-11-02.

In Modem, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01780439; Issue ID: MSV-8901.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- MediaTek, Inc. / MediaTek chipset: MT2716 (affected); MT2735 (affected); MT2737 (affected); MT6739 (affected); MT6761 (affected); MT6762 (affected); MT6763 (affected); MT6765 (affected); MT6767 (affected); MT6768 (affected); MT6769 (affected); MT6771 (affected); MT6779 (affected); MT6781 (affected); MT6783 (affected); MT6785 (affected); MT6789 (affected); MT6813 (affected); MT6815 (affected); MT6833 (affected); MT6835 (affected); MT6853 (affected); MT6855 (affected); MT6858 (affected); MT6873 (affected); MT6875 (affected); MT6877 (affected); MT6878 (affected); MT6879 (affected); MT6880 (affected); MT6881 (affected); MT6883 (affected); MT6885 (affected); MT6886 (affected); MT6889 (affected); MT6890 (affected); MT6891 (affected); MT6893 (affected); MT6895 (affected); MT6896 (affected); MT6897 (affected); MT6899 (affected); MT6980 (affected); MT6982 (affected); MT6983 (affected); MT6985 (affected); MT6986 (affected); MT6988 (affected); MT6989 (affected); MT6990 (affected); MT6991 (affected); MT6993 (affected); MT8668 (affected); MT8676 (affected); MT8678 (affected); MT8755 (affected); MT8765 (affected); MT8766 (affected); MT8766R (affected); MT8768 (affected); MT8771 (affected); MT8775 (affected); MT8781 (affected); MT8786 (affected); MT8788E (affected); MT8791 (affected); MT8791T (affected); MT8792 (affected); MT8793 (affected); MT8796 (affected); MT8797 (affected); MT8798 (affected); MT8863 (affected); MT8873 (affected); MT8875 (affected); MT8883 (affected); MT8893 (affected). Source: CNA: MediaTek

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-787

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.mediatek.com/product-security-bulletin/November-2026 (CNA: MediaTek)

## Provenance

- CNA: MediaTek: https://www.cve.org/CVERecord?id=CVE-2026-20564; retrieved 2026-11-02; source updated 2026-11-02

Revision: 76b1b457bc24dc7f3da979f8168abc3ce49c4969b333eb9d0234de657644b848

Canonical: https://y2.dev/cve/CVE-2026-20564