SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege (CVE-2021-43613) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2021-43613

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

Answer in brief

CVE-2021-43613 records a Unknown severity vulnerability in SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalation of privilege. The current sources do not mark it as known exploited. The current feed maps Insyde Software/InsydeH2O (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Insyde Software/InsydeH2O (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Insyde Software/InsydeH2Ogeneric	See in the Solution	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Insyde Software/InsydeH2O.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Source referenceinsyde.com

Upstream source 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

Quoted source text, attributed separately from HOL analysis.