CVE-2026-20519

Severity: high (CVSS 7.5 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: 2026-10-05 · updated 2026-10-08
Weakness: CWE-787

Description

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01778993; Issue ID: MSV-8898.

Affected products

Mediatek Mt2716 Firmware: all versions
Mediatek Mt2735 Firmware: all versions
Mediatek Mt2737 Firmware: all versions
Mediatek Mt6813 Firmware: all versions
Mediatek Mt6815 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 Mt6875 Firmware: all versions
Mediatek Mt6877 Firmware: all versions
Mediatek Mt6878 Firmware: all versions
Mediatek Mt6879 Firmware: all versions
Mediatek Mt6880 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 Mt6890 Firmware: all versions
Mediatek Mt6891 Firmware: all versions
Mediatek Mt6893 Firmware: all versions
Mediatek Mt6895 Firmware: all versions
Mediatek Mt6896 Firmware: all versions
Mediatek Mt6897 Firmware: all versions
Mediatek Mt6899 Firmware: all versions
Mediatek Mt6980 Firmware: all versions
Mediatek Mt6982 Firmware: all versions

References

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

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