EUVD-2026-21041

| CVE-2026-35556 CRITICAL
2026-04-09 icscert GHSA-xgm5-hf6v-855x
9.2
CVSS 4.0
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CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
EUVD ID Assigned
Apr 09, 2026 - 19:15 euvd
EUVD-2026-21041
Analysis Generated
Apr 09, 2026 - 19:15 vuln.today
CVE Published
Apr 09, 2026 - 18:57 nvd
CRITICAL 9.2

Tags

Information Disclosure Openplc V3

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.

Analysis

Plaintext credential storage in OpenPLC_V3 enables network-based attackers to retrieve authentication credentials without requiring prior authentication or user interaction, leading to complete system compromise. The CVSS v4.0 score of 9.2 reflects critical-severity risk from network-accessible credential exposure affecting confidentiality and integrity across all OpenPLC_V3 deployments. …

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Remediation

Within 24 hours: Identify all OpenPLC_V3 instances in your environment and document their network accessibility and operational role. Within 7 days: Implement network segmentation to restrict unauthenticated access to OpenPLC_V3 systems; require authentication at firewall/network perimeter level. …

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Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +46
POC: 0

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EUVD-2026-21041 vulnerability details – vuln.today
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