CVE-2026-90891CWE-1256

CVE-2026-90891

Medium · published September 14, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
2.0
In the wild
Unconfirmed
What it is

ASRock Polychrome SYNC/RGB software utility developed by ASRock Inc. has an Improper Access Control vulnerability. Authenticated local attackers can send a specially crafted IOCTL request to cause the driver to write to improperly restricted I/O ports, resulting in a forced operating system reboot.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
6.8 · CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00125 · 2.0th percentile
Weakness
CWE-1256 · Improper Restriction of Software Interfaces to Hardware Features
Published
2026-09-14T15:17Z
References (2)
https://www.twcert.org.tw/en/cp-139-11204-6b1c6-2.html · [email protected]https://www.twcert.org.tw/tw/cp-132-11205-f6677-1.html · [email protected]
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 14 SEP 10:37Z
    ASRock｜ASRock Polychrome SYNC/RGB software utility - Improper Access Control
    cvelistv5