CVE-2026-20519
highIn Modem, there is a possible out of bounds write due to a missing bounds check.
Vendor / product: Mediatek — mt6833 firmware
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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-10-05 02:16
Modified: 2026-10-08 14:49
NVD status: Analyzed
Last synced 3 days ago
Verified against the source API 2026-10-27 06:57 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
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
mediatek / mt6983_firmware all versions
mediatek / mt6985_firmware all versions
mediatek / mt6986_firmware all versions
mediatek / mt6988_firmware all versions
mediatek / mt6989_firmware all versions
mediatek / mt6990_firmware all versions
mediatek / mt6991_firmware all versions
mediatek / mt6993_firmware all versions
mediatek / mt8668_firmware all versions
mediatek / mt8676_firmware all versions
mediatek / mt8678_firmware all versions
mediatek / mt8755_firmware all versions
mediatek / mt8771_firmware all versions
mediatek / mt8775_firmware all versions
mediatek / mt8791_firmware all versions
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 / mt8791t_firmware all versions
mediatek / mt8792_firmware all versions
mediatek / mt8793_firmware all versions
mediatek / mt8796_firmware all versions
mediatek / mt8797_firmware all versions
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://www.mediatek.com/product-security-bulletin/October-2026
References
- https://www.mediatek.com/product-security-bulletin/October-2026 security@mediatek.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:57 UTC · record ↗