CVE-2021-33626

7.8 HIGH
Published: October 01, 2021 Modified: November 04, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Source: cve@mitre.org
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220216-0006/
Source: cve@mitre.org
Third Party Advisory
https://www.insyde.com/security-pledge
Source: cve@mitre.org
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2021001
Source: cve@mitre.org
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-306654.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220216-0006/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.insyde.com/security-pledge
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.insyde.com/security-pledge/SA-2021001
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.kb.cert.org/vuls/id/796611
Source: af854a3a-2127-422b-91ae-364da2661108

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.8 / 10.0
EPSS (Exploit Probability)
0.1%
23th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-829

Affected Vendors

insyde siemens

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