EUVD-2026-77245
GHSA-4p6h-654m-8phx
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
Network-reachable web interface requires low-privilege authentication (PR:L) and victim interaction (UI:R); scope changes to browser context with low C/I impact, no availability impact.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
4DescriptionCVE.org
Cross-site scripting vulnerability exists in PC-HELPER Wireless I/O DIO-0404RY-LWF and PC-HELPER Wireless I/O DIO-0404RY-LWF-US. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
AnalysisAI
Cross-site scripting in the embedded web management interfaces of Contec Co., Ltd. PC-HELPER Wireless I/O DIO-0404RY-LWF and DIO-0404RY-LWF-US industrial modules allows a low-privilege authenticated attacker to inject malicious script that executes in the browser session of another logged-in user. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) network-level reachability to the device's HTTP web management interface from the attacker's host; (2) a valid low-privilege authenticated session on the device (PR:L per CVSS 4.0), meaning independent credential acquisition is a prerequisite and no authentication bypass is implied; (3) a second separately authenticated victim user who actively visits or is socially engineered to visit the page containing the injected payload (UI:A per CVSS 4.0). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N, score 4.8) accurately characterizes this as a medium-severity issue: it requires a pre-existing low-privilege authenticated session and depends on a separate authenticated victim actively visiting the injected page. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the Contec Co., Ltd. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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