CVE-2026-36540

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Netis AC1200 Router NC21 V4.0.1.4296 is vulnerable to unauthenticated command injection via the /cgi-bin/skk_set.cgi endpoint. The password and new_pwd_confirm POST parameters are passed directly to the underlying OS shell without sanitization. An attacker can inject arbitrary shell commands by wrapping them in backticks (`) and encoding them in base64. Because the endpoint requires no authentication, any device on the LAN can achieve full Remote Code Execution on the router's operating system with a single HTTP POST request."}, {"lang": "es", "value": "Netis AC1200 Router NC21 V4.0.1.4296 es vulnerable a inyecci\u00f3n de comandos no autenticada a trav\u00e9s del endpoint /cgi-bin/skk_set.cgi. Los par\u00e1metros POST password y new_pwd_confirm se pasan directamente al shell del sistema operativo subyacente sin sanitizaci\u00f3n. Un atacante puede inyectar comandos de shell arbitrarios envolvi\u00e9ndolos entre comillas invertidas (\u201d) y codific\u00e1ndolos en base64. Debido a que el endpoint no requiere autenticaci\u00f3n, cualquier dispositivo en la LAN puede lograr la ejecuci\u00f3n remota de c\u00f3digo completa en el sistema operativo del router con una \u00fanica solicitud HTTP POST."}], "id": "CVE-2026-36540", "lastModified": "2026-10-19T22:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-36540", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-28T13:41:25.316769Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:16:45.637", "references": [{"source": "cve@mitre.org", "url": "https://github.com/sir3ns/cve-disclosure/blob/main/CVE-2026-36540/readme.md"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/sir3ns/cve-disclosure/blob/main/CVE-2026-36540/readme.md"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.0.1.4296"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "ac1200_router", "vendor": "netis"}], "created": "2026-05-27T19:15:26.089671+00:00", "title": "Unauthenticated Command Injection via skk_set.cgi in Netis AC1200 Router NC21", "updated": "2026-05-30T21:22:37.515272+00:00", "vendors": ["netis", "netis$PRODUCT$ac1200_router"]}