CVE-2026-20520CWE-787

CVE-2026-20520

High · published October 5, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
12.8
In the wild
Unconfirmed
What it is

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: MOLY01778988; Issue ID: MSV-8897.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00228 · 12.8th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-05T06:16Z
Affected products (57)
ProductVersionsFixed in
mediatek/mt2716_firmwareall versions—
mediatek/mt2735_firmwareall versions—
mediatek/mt2737_firmwareall versions—
mediatek/mt6813_firmwareall versions—
mediatek/mt6815_firmwareall versions—
mediatek/mt6833_firmwareall versions—
mediatek/mt6835_firmwareall versions—
mediatek/mt6853_firmwareall versions—
mediatek/mt6855_firmwareall versions—
mediatek/mt6858_firmwareall versions—
mediatek/mt6873_firmwareall versions—
mediatek/mt6875_firmwareall versions—
mediatek/mt6877_firmwareall versions—
mediatek/mt6878_firmwareall versions—
mediatek/mt6879_firmwareall versions—
mediatek/mt6880_firmwareall versions—
mediatek/mt6881_firmwareall versions—
mediatek/mt6883_firmwareall versions—
mediatek/mt6885_firmwareall versions—
mediatek/mt6886_firmwareall versions—
mediatek/mt6889_firmwareall versions—
mediatek/mt6890_firmwareall versions—
mediatek/mt6891_firmwareall versions—
mediatek/mt6893_firmwareall versions—
mediatek/mt6895_firmwareall versions—
mediatek/mt6896_firmwareall versions—
mediatek/mt6897_firmwareall versions—
mediatek/mt6899_firmwareall versions—
mediatek/mt6980_firmwareall versions—
mediatek/mt6982_firmwareall versions—
mediatek/mt6983_firmwareall versions—
mediatek/mt6985_firmwareall versions—
mediatek/mt6986_firmwareall versions—
mediatek/mt6988_firmwareall versions—
mediatek/mt6989_firmwareall versions—
mediatek/mt6990_firmwareall versions—
mediatek/mt6991_firmwareall versions—
mediatek/mt6993_firmwareall versions—
mediatek/mt8668_firmwareall versions—
mediatek/mt8676_firmwareall versions—
mediatek/mt8678_firmwareall versions—
mediatek/mt8755_firmwareall versions—
mediatek/mt8771_firmwareall versions—
mediatek/mt8775_firmwareall versions—
mediatek/mt8791_firmwareall versions—
mediatek/mt8791t_firmwareall versions—
mediatek/mt8792_firmwareall versions—
mediatek/mt8793_firmwareall versions—
mediatek/mt8796_firmwareall versions—
mediatek/mt8797_firmwareall versions—
mediatek/mt8798_firmwareall versions—
mediatek/mt8863_firmwareall versions—
mediatek/mt8873_firmwareall versions—
mediatek/mt8883_firmwareall versions—
mediatek/mt8893_firmwareall versions—
mediatek/mt8695_firmwareall versions—
mediatek/mt8696_firmwareall versions—
References (1)
https://www.mediatek.com/product-security-bulletin/October-2026 · [email protected]
EPSS history
Timeline
  • 07 OCT 03:40Z
    EPSS moved — → 0%
    epss
  • 05 OCT 01:39Z
    In Modem, there is a possible out of bounds write due to a missing bounds check
    cvelistv5