CVE-2026-20501

Severity: high (CVSS 8.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-07 · updated 2026-09-09
Weakness: CWE-122

Description

In vdec, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11262030; Issue ID: MSV-9197.

Affected products

Mediatek Mt2718 Firmware: all versions
Mediatek Mt6580 Firmware: all versions
Mediatek Mt6739 Firmware: all versions
Mediatek Mt6761 Firmware: all versions
Mediatek Mt6765 Firmware: all versions
Mediatek Mt6768 Firmware: all versions
Mediatek Mt6769 Firmware: all versions
Mediatek Mt6779 Firmware: all versions
Mediatek Mt6781 Firmware: all versions
Mediatek Mt6785 Firmware: all versions
Mediatek Mt6789 Firmware: all versions
Mediatek Mt6833 Firmware: all versions
Mediatek Mt6835 Firmware: all versions
Mediatek Mt6853 Firmware: all versions
Mediatek Mt6855 Firmware: all versions
Mediatek Mt6858 Firmware: all versions
Mediatek Mt6873 Firmware: all versions
Mediatek Mt6877 Firmware: all versions
Mediatek Mt6878 Firmware: all versions
Mediatek Mt6879 Firmware: all versions
Mediatek Mt6881 Firmware: all versions
Mediatek Mt6883 Firmware: all versions
Mediatek Mt6885 Firmware: all versions
Mediatek Mt6886 Firmware: all versions
Mediatek Mt6889 Firmware: all versions
Mediatek Mt6893 Firmware: all versions
Mediatek Mt6895 Firmware: all versions
Mediatek Mt6897 Firmware: all versions
Mediatek Mt6899 Firmware: all versions
Mediatek Mt6983 Firmware: all versions

References

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

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