EUVD-2026-77220
GHSA-4vmh-72fp-8qfh
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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
Adjacent-only web UI access (AV:A), no attacker privileges needed (PR:N), victim must interact (UI:R), browser-scope XSS causes scope change with low C/I impact.
Primary rating from Vendor (jpcert).
CVSS VectorVendor: jpcert
Lifecycle Timeline
3DescriptionCVE.org
Cross-site scripting vulnerability exists in SGA1000. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
AnalysisAI
Cross-site scripting (XSS) in the Contec SGA1000 web management interface allows an adjacent-network attacker to inject and execute arbitrary JavaScript in the browser of an authenticated user who interacts with malicious content. The vulnerability is classified CWE-79 (Improper Neutralization of Input During Web Page Generation) and was disclosed via JPCERT/CC alongside a vendor security advisory from Contec. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions: (1) the attacker must be on the same network segment or VLAN as the SGA1000 management interface (AV:A - not exploitable from the open internet); (2) a user with an active authenticated session to the SGA1000 web management console must actively interact with attacker-controlled content (UI:A); (3) the SGA1000 web management interface must be reachable by the victim's browser. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 4.8 (Medium) reflects constrained real-world impact. … 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 (contec_security_fl_26091000_en.pdf) for the patched firmware or software version - exact fix version is not independently confirmable from available source data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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OS command injection in Contec's SGA1000 device allows an authenticated network attacker to execute arbitrary commands o
Path traversal in Contec SGA1000 allows a network attacker with FTP credentials to read and overwrite arbitrary files on
Cross-site request forgery affects a broad range of Contec industrial data loggers, flow computers, and remote I/O coupl
Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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