CVE-2026-20528CWE-787

CVE-2026-20528

Medium · published October 5, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
1.7
In the wild
Unconfirmed
What it is

In ccci, there is a possible out of bounds write and read due to a missing bounds check. This could lead to local information disclosure, memory corruption, crashes, or privilege escalation if a malicious actor has already obtained the System privilege. User interaction is needed for exploitation. Patch ID: ALPS11428950 (Note: For MT6880, MT6890) / ALPS10563453 (Note: For MT6980D, MT6990, MT6986, MT6986D, MT6813, MT6988) / AUTO00858766 (Note: For MT2735, MT2737); Issue ID: MSV-9893.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00119 · 1.7th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-05T06:16Z
Affected products (10)
ProductVersionsFixed in
mediatek/mt2735_firmwareall versions—
mediatek/mt2737_firmwareall versions—
mediatek/mt6813_firmwareall versions—
mediatek/mt6880_firmwareall versions—
mediatek/mt6890_firmwareall versions—
mediatek/mt6980d_firmwareall versions—
mediatek/mt6986_firmwareall versions—
mediatek/mt6986d_firmwareall versions—
mediatek/mt6988_firmwareall versions—
mediatek/mt6990_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 01:40Z
    In ccci, there is a possible out of bounds write and read due to a missing bounds check
    cvelistv5