Vulnerability in Gigabyte Mbstorage
CVE-2026-9492
The MBStorage DRAM lighting control module within Gigabyte Control Center (GCC) developed by GIGABYTE Technology has an Improper Access Control vulnerability. Authenticated local attackers can send specific IOCTL commands through the driver MyPortIO_x64.sys bundled with the module, thereby arbitrarily reading and writing physical memory and obtaining kernel-level privileges.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (4.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gigabyte Mbstorage — versions 0
Weakness classification (CWE)
References
- www.twcert.org.tw/tw/cp-132-11033-97316-1.html (third-party-advisory)
- www.twcert.org.tw/en/cp-139-11034-f7f2f-2.html (third-party-advisory)
Frequently asked questions
- What is CVE-2026-9492?
- CVE-2026-9492 is a high-severity vulnerability in Gigabyte Mbstorage, classified under CWE-782. CVSS score: 7.8/10. Published 2026-07-13.
- How severe is CVE-2026-9492?
- High severity. CVSS v3 base score is 7.8 out of 10.