What’s Vulnerable › Vulnerabilities

CVE-2026-12855: H19WMIHandlerSmm: unvalidated memory boundary could result in arbitrary code execution.

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-09 · updated 2026-10-01
• Weakness: CWE-20

Description

Unvalidated memory boundary could result in arbitrary code execution. The vulnerability exists in the code developed specifically for HP projects.

Affected products

• Insyde Software InsydeH2O: See in the Solution

In the news

• VU#553437: InsydeH2O IHISI SMM is vulnerable to unsafe memory write operations

References

• https://www.insyde.com/security-pledge/sa-2026009/
• https://www.kb.cert.org/vuls/id/553437

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