CVE-2021-33626

CVE-2021-33626CVE-2021-33626

insyde / insydeh2o

Description

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.

Scoring

CVSS 7.8 ()
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Last modified2026-08-11
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.