CVE-2021-43613

SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege

Published Sep 3, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege

Remediation

Vendor Solution

Kernel 5.1: Version 05.17.09 Kernel 5.2: Version 05.27.09 Kernel 5.3: Version 05.36.09 Kernel 5.4: Version 05.44.09 Kernel 5.5: Version 05.52.09

Tracking

Sign in to view the affected projects.

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': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An issue was discovered in SysPasswordDxe in Insyde InsydeH2O. User and administrator password hashes are exposed in runtime UEFI variables, leading to escalation of privilege
Title SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege
Weaknesses CWE-732
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Insyde
Published
Updated
Sep 3, 2026, 1:03 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