CVE-2021-43614

VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to code execution

Published Sep 3, 2026 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Description
Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Insyde Software
Insyde Software insydeh2o
Vendors & Products Insyde Software
Insyde Software insydeh2o
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-120
Type Values Removed Values Added
Description Error in handling the PlatformLangCodes UEFI variable could cause a buffer overflow, leading to resource exhaustion and failure.
Title VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to code execution
References
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Insyde
Published
Updated
Sep 3, 2026, 1:13 PM
Reserved
Nov 12, 2021, 10:48 PM
Status
Awaiting Analysis
Published
Sep 3, 2026, 1:04 PM
Modified
Sep 3, 2026, 6:09 PM