Vulnerability · Published Aug 26, 2026 · Assigned by Insyde
CVE-2026-9805FMTSWriteUseIntelLib: FMTS SMM IHISI Buffer Overflow
Low 2.7
In plain English
A low-severity out-of-bounds write in InsydeH2O from Insyde Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Severity (CVSS 3.1)2.7Low
Exploit odds (30 days)0.1%top 97.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Insyde Software | InsydeH2O | See in the Solution |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L