What is CVE-2026-9805?

CVE-2026-9805 is a low-severity vulnerability in Insyde Software Insydeh2o, classified under Out-of-bounds Write. CVSS score: 2.7/10. Published 2026-08-26.

How severe is CVE-2026-9805?

Low severity. CVSS v3 base score is 2.7 out of 10.

Buffer overflow in Insyde Software Insydeh2o

CVE-2026-9805

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

Vulnerability class: Buffer Overflow

EPSS: 0.001 (1.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L.

Affected products

Insyde Software Insydeh2o — versions See in the Solution

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

8338d8cb-57f7-4252-abc0-96fd13e98d21

Frequently asked questions

What is CVE-2026-9805?: CVE-2026-9805 is a low-severity vulnerability in Insyde Software Insydeh2o, classified under Out-of-bounds Write. CVSS score: 2.7/10. Published 2026-08-26.
How severe is CVE-2026-9805?: Low severity. CVSS v3 base score is 2.7 out of 10.