CVE-2026-20519

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

CVE-2026-20519 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0023, placing it in the 0th percentile for exploitation probability.

CVE-2026-20519 affects products from mediatek, specifically: mt2716, mt2716_firmware, mt2735, mt2735_firmware, mt2737, mt2737_firmware, mt6813, mt6813_firmware, mt6815, mt6815_firmware, mt6833, mt6833_firmware, mt6835, mt6835_firmware, mt6853, mt6853_firmware, mt6855, mt6855_firmware, mt6858, mt6858_firmware, mt6873, mt6873_firmware, mt6875, mt6875_firmware, mt6877, mt6877_firmware, mt6878, mt6878_firmware, mt6879, mt6879_firmware, mt6880, mt6880_firmware, mt6881, mt6881_firmware, mt6883, mt6883_firmware, mt6885, mt6885_firmware, mt6886, mt6886_firmware, mt6889, mt6889_firmware, mt6890, mt6890_firmware, mt6891, mt6891_firmware, mt6893, mt6893_firmware, mt6895, mt6895_firmware, mt6896, mt6896_firmware, mt6897, mt6897_firmware, mt6899, mt6899_firmware, mt6980, mt6980_firmware, mt6982, mt6982_firmware, mt6983, mt6983_firmware, mt6985, mt6985_firmware, mt6986, mt6986_firmware, mt6988, mt6988_firmware, mt6989, mt6989_firmware, mt6990, mt6990_firmware, mt6991, mt6991_firmware, mt6993, mt6993_firmware, mt8668, mt8668_firmware, mt8676, mt8676_firmware, mt8678, mt8678_firmware, mt8695, mt8695_firmware, mt8696, mt8696_firmware, mt8755, mt8755_firmware, mt8771, mt8771_firmware, mt8775, mt8775_firmware, mt8791, mt8791_firmware, mt8791t, mt8791t_firmware, mt8792, mt8792_firmware, mt8793, mt8793_firmware, mt8796, mt8796_firmware, mt8797, mt8797_firmware, mt8798, mt8798_firmware, mt8863, mt8863_firmware, mt8873, mt8873_firmware, mt8883, mt8883_firmware, mt8893, mt8893_firmware. Check the affected products table above for specific version ranges.

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.