Vulnerability · Published Sep 14, 2026 · Assigned by twcert
CVE-2026-90891ASRock｜ASRock Polychrome SYNC/RGB software utility - Improper Access Control
Medium 5.5
In plain English
A medium-severity security flaw in ASRock Polychrome SYNC/RGB for MB from ASRock. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 97.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ASRock | ASRock Polychrome SYNC/RGB for MB | 0 – through 1.0.118 |
| ASRock | ASRock Polychrome SYNC/RGB for VGA | 0 – through 2.0.219 |
Weakness: CWE-1256 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://www.twcert.org.tw/tw/cp-132-11205-f6677-1.html third-party-advisory
- https://www.twcert.org.tw/en/cp-139-11204-6b1c6-2.html third-party-advisory