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Actively exploitedKnown ransomware use

CVE-2018-19323 GIGABYTE Multiple Products Privilege Escalation Vulnerability

The GPCIDrv and GDrv low-level drivers in GIGABYTE App Center, AORUS Graphics Engine, XTREME Gaming Engine, and OC GURU expose functionality to read and write arbitrary physical memory. This could be leveraged by a local attacker to elevate privileges.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 24 Oct 2022.
  • CISA lists it as known to be used in ransomware campaigns.
  • Rated Critical severity (CVSS 9.8, scored by CISA).
  • It has been in the catalogue for 1,474 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS ENGINE before 1.57, XTREME GAMING ENGINE before 1.26, and OC GURU II v2.08 exposes functionality to read and write Machine Specific Registers (MSRs).

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for GIGABYTE Multiple Products. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply updates per vendor instructions.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated critical, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 14 Nov 2022 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

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CVE-2018-19322 · RansomwareGIGABYTE Multiple Products Code Execution VulnerabilityAdded 24 Oct 2022CVE-2018-19321 · RansomwareGIGABYTE Multiple Products Privilege Escalation VulnerabilityAdded 24 Oct 2022CVE-2018-19320 · RansomwareGIGABYTE Multiple Products Unspecified VulnerabilityAdded 24 Oct 2022

All 4 exploited GIGABYTE vulnerabilities

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2018-19323
  3. CVE record: CVE-2018-19323
  4. FIRST EPSS
  5. gigabyte.com/Support/Security/1801
  6. seclists.org/fulldisclosure/2018/Dec/39
  7. secureauth.com/labs/advisories/gigabyte-drivers-elevation-privilege-vulnerabilities
  8. securityfocus.com/bid/106252
  9. gigabyte.com/tw/Support/Utility/Graphics-Card