What’s Vulnerable › Vulnerabilities

CVE-2026-9805: FMTSWriteUseIntelLib: FMTS SMM IHISI Buffer Overflow

• Severity: low (CVSS 2.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-08-31
• Weakness: CWE-787

Description

SMM IHISI command handler, FMTSWriteUseIntelLib, for FMTS command 0x32, read and write data without checking buffer size and could cause buffer overflow.

Affected products

• Insyde Software InsydeH2O: See in the Solution

References

• https://www.insyde.com/security-pledge/sa-2026006/

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