CVE-2021-38489— HDD Password Stored In Plaintext
Quick assessment
Affected
Insyde Software InsydeH2O
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Siemens SIMATIC是西门子（Siemens）的一款组态软件。 Siemens SIMATIC存在安全漏洞，该漏洞源于攻击者可以通过UEFI使用Independent BIOS Developers的多个漏洞。
Possible ATT&CK Techniques 1 AI
T1071 · Application Layer Protocol
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I. Basic Information for CVE-2021-38489
Vulnerability Information
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Vulnerability Title
HDD Password Stored In Plaintext
Source: CVE Program / CVE List V5
Vulnerability Description
HDD password plaintext is stored in a UEFI variable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
明文存储口令
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens SIMATIC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SIMATIC是西门子（Siemens）的一款组态软件。 Siemens SIMATIC存在安全漏洞，该漏洞源于攻击者可以通过UEFI使用Independent BIOS Developers的多个漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Insyde Software | InsydeH2O | See in the Solution | - |
|
II. Public POCs for CVE-2021-38489
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-38489 (1)
Same Patch Batch · Insyde Software · 2026-09-03 · 3 CVEs total
| CVE-2021-43614 | 6.7 MEDIUM | VariableEditSmm: Error checking of UEFI variables could cause buffer overflow, leading to |
| CVE-2021-43613 | 6.5 MEDIUM | SysPasswordDxe: Password hashes are exposed in runtime UEFI variables, leading to escalati |
IV. Related Vulnerabilities
Same product: InsydeH2O
-
CVE-2021-43614
VariableEditSmm: Error checking of UEFI variables could caus -
CVE-2021-43613
SysPasswordDxe: Password hashes are exposed in runtime UEFI -
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FMTSWriteUseIntelLib: FMTS SMM IHISI Buffer Overflow -
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Lack of verified boot to certain FV may cause arbitrary code -
CVE-2025-10451
H19Int15CallbackSmm: SMM memory corruption vulnerability in
Same vendor: Insyde Software
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CVE-2021-43614
VariableEditSmm: Error checking of UEFI variables could caus -
CVE-2021-43613
SysPasswordDxe: Password hashes are exposed in runtime UEFI -
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FMTSWriteUseIntelLib: FMTS SMM IHISI Buffer Overflow -
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HDD Password leakage vulnerability -
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Lack of verified boot to certain FV may cause arbitrary code
Same weakness: CWE-256
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V. Comments for CVE-2021-38489
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