Vulnerability Intelligence Report
H19WMIHandlerSmm: unvalidated memory boundary could result in arbitrary code execution.
CVE-2026-12855
Unvalidated memory boundary could result in arbitrary code execution. The vulnerability exists in the code developed specifically for HP projects.
No Active Exploit Signals
CVSS Base Score
8.2
HIGH
Exploitability:1.5
Impact Score:6.1
EPSS Probability:0.12%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-20 ↗CWE-20: Improper Input Validation
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Insyde Software | InsydeH2O | See in the Solution (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.125%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Insyde Software · Vendor · USA |
| Reserved | 2026-06-22T05:49:02 |
| Published | 2026-09-09T03:59:11 |
| Patch Date | 2026-09-09 |
| Last Updated | 2026-09-09T20:51:33 |
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