EUVD-2026-77221
GHSA-v6v4-cp9m-xh2x
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-accessible web UI, low-privilege auth required, user interaction mandatory; scope change to browser with low C/I impact, no availability effect.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
3DescriptionCVE.org
Cross-site scripting vulnerability exists in Contec RP-WAH-SR Series. 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 Contec RP-WAH-SR Series web management interface allows an authenticated low-privilege attacker to inject and execute arbitrary JavaScript in the browser of another logged-in user. The CVSS 4.0 vector (PR:L/UI:A) confirms exploitation requires both an authenticated session to plant the payload and a separate victim user who must actively interact with the affected page. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid low-privilege authenticated account on the Contec RP-WAH-SR web management interface. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 4.8 (Medium) is broadly appropriate for this class of vulnerability. … 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 vendor advisory (https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_fl_26091000_en.pdf) for firmware update guidance; no specific patched firmware version is independently confirmed from the available input data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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