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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。

CVSS 8.2 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1071 · Application Layer Protocol

Affected Version Matrix 1

VendorProduct Version RangeStatus
Insyde Software InsydeH2O See in the Solution affected
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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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III. Intelligence Information for CVE-2021-38489

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Vendor Advisories 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
Same vendor: Insyde Software
Same weakness: CWE-256