CVE-2026-20521CWE-121

CVE-2026-20521

High · published October 5, 2026

CVSS v3.1
8.4
EPSS
0%
Percentile
2.7
In the wild
Unconfirmed
What it is

In Video HAL, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11375674; Issue ID: MSV-9571.

The record
Technical detail
CVSS v3.1
8.4 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00134 · 2.7th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-10-05T06:16Z
Affected products (48)
ProductVersionsFixed in
mediatek/mt6993_firmwareall versions—
mediatek/mt8126_firmwareall versions—
mediatek/mt8171_firmwareall versions—
mediatek/mt8186_firmwareall versions—
mediatek/mt8188_firmwareall versions—
mediatek/mt8189_firmwareall versions—
mediatek/mt8195_firmwareall versions—
mediatek/mt8196_firmwareall versions—
mediatek/mt8367_firmwareall versions—
mediatek/mt8391_firmwareall versions—
mediatek/mt8395_firmwareall versions—
mediatek/mt8668_firmwareall versions—
mediatek/mt8676_firmwareall versions—
mediatek/mt8678_firmwareall versions—
mediatek/mt8695_firmwareall versions—
mediatek/mt8696_firmwareall versions—
mediatek/mt8781_firmwareall versions—
mediatek/mt8788e_firmwareall versions—
mediatek/mt8792_firmwareall versions—
mediatek/mt8793_firmwareall versions—
mediatek/mt8799_firmwareall versions—
mediatek/mt8910_firmwareall versions—
mediatek/mt2718_firmwareall versions—
mediatek/mt6768_firmwareall versions—
mediatek/mt6769_firmwareall versions—
mediatek/mt6781_firmwareall versions—
mediatek/mt6789_firmwareall versions—
mediatek/mt6833_firmwareall versions—
mediatek/mt6835_firmwareall versions—
mediatek/mt6853_firmwareall versions—
mediatek/mt6855_firmwareall versions—
mediatek/mt6858_firmwareall versions—
mediatek/mt6877_firmwareall versions—
mediatek/mt6878_firmwareall versions—
mediatek/mt6879_firmwareall versions—
mediatek/mt6881_firmwareall versions—
mediatek/mt6883_firmwareall versions—
mediatek/mt6885_firmwareall versions—
mediatek/mt6886_firmwareall versions—
mediatek/mt6889_firmwareall versions—
mediatek/mt6893_firmwareall versions—
mediatek/mt6895_firmwareall versions—
mediatek/mt6897_firmwareall versions—
mediatek/mt6899_firmwareall versions—
mediatek/mt6983_firmwareall versions—
mediatek/mt6985_firmwareall versions—
mediatek/mt6989_firmwareall versions—
mediatek/mt6991_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 Video HAL, there is a possible escalation of privilege due to a missing bounds check
    cvelistv5