CVE-2026-35556

Plaintext storage of a password in OpenPLC_V3

Published Apr 9, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

OpenPLC_v3 is now considered to be end of life. Users are recommended to upgrade to OpenPLC Runtime v4 ( https://github.com/autonomy-logic/openplc-runtime ).

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Openplcproject openplc V3 Firmware
CPEs cpe:2.3:h:openplcproject:openplc_v3:-:*:*:*:*:*:*:*
cpe:2.3:o:openplcproject:openplc_v3_firmware:-:*:*:*:*:*:*:*
Vendors & Products Openplcproject openplc V3 Firmware
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Openplcproject
Openplcproject openplc V3
Vendors & Products Openplcproject
Openplcproject openplc V3
Type Values Removed Values Added
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.
Title Plaintext storage of a password in OpenPLC_V3
Weaknesses CWE-256
References
Metrics cvssV4_0

{'score': 9.2, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Apr 10, 2026, 6:03 PM
Reserved
Apr 6, 2026, 3:01 PM
Status
Analyzed
Published
Apr 9, 2026, 7:16 PM
Modified
Jun 17, 2026, 10:40 AM