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CVE-2026-35556— Plaintext storage of a password in OpenPLC_V3

Quick assessment

Affected
OpenPLC_V3 OpenPLC_V3
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.

OpenPLC是Thiago Alves个人开发者的一种开源的可编程逻辑控制器。可为自动化和研究提供低成本的工业解决方案。 OpenPLC_V3存在安全漏洞，该漏洞源于明文存储密码，可能导致攻击者检索凭据并访问敏感信息。

AI Predicted 5.9 Difficulty: Easy EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2026-35556

Vulnerability Information
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Vulnerability Title
Plaintext storage of a password in OpenPLC_V3
Source: CVE Program / CVE List V5
Vulnerability Description
OpenPLC_V3 is vulnerable to a Plaintext Storage of a Password vulnerability that could allow an attacker to retrieve credentials and access sensitive information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
明文存储口令
Source: CVE Program / CVE List V5
Vulnerability Title
OpenPLC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenPLC是Thiago Alves个人开发者的一种开源的可编程逻辑控制器。可为自动化和研究提供低成本的工业解决方案。 OpenPLC_V3存在安全漏洞，该漏洞源于明文存储密码，可能导致攻击者检索凭据并访问敏感信息。
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
OpenPLC_V3 OpenPLC_V3 All versions -

II. Public POCs for CVE-2026-35556

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III. Intelligence Information for CVE-2026-35556

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Same Patch Batch · OpenPLC_V3 · 2026-04-09 · 3 CVEs total

CVE-2026-28205 Initialization of a resource with an insecure default in OpenPLC_V3
CVE-2026-35063 Missing Authorization in OpenPLC_V3

IV. Related Vulnerabilities

Same product: OpenPLC_V3
Same vendor: OpenPLC_V3
Same weakness: CWE-256

V. Comments for CVE-2026-35556

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