CVE-2026-20509CWE-121

CVE-2026-20509

Medium · published September 7, 2026

CVSS v3.1
6.7
EPSS
0%
Percentile
1.9
In the wild
Unconfirmed
What it is

In Power HAL, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11165543; Issue ID: MSV-9011.

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
0.00122 · 1.9th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-09-07T06:17Z
References (1)
https://www.mediatek.com/product-security-bulletin/September-2026 · [email protected]
EPSS history
Timeline
  • 08 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 07 SEP 01:57Z
    In Power HAL, there is a possible out of bounds write due to a missing bounds check
    cvelistv5