Vulnerability in Insyde Insydeh2o

CVE-2021-33626

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

EPSS: 0.003 (23.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-33626?
CVE-2021-33626 is a high-severity vulnerability in Insyde Insydeh2o, classified under Inclusion of Functionality from Untrusted Control Sphere. CVSS score: 7.8/10. Published 2021-10-01.
How severe is CVE-2021-33626?
High severity. CVSS v3 base score is 7.8 out of 10.