CVE-2026-50720

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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": "The Ingenic T31 SoC boot ROM flash-boot verification path compares only a single 32-bit word of the RSA signature output against a single 32-bit word of the SHA-256 payload digest, rather than compare the full data. This allows an attacker with physical write access to boot media to forge modified SPL (Secondary Program Loader) images that pass secure boot verification without possession of the OEM signing key. Each forgery attempt succeeds with approximately 2/3 probability. This has been validated via reverse engineering, software emulation against vendor-signed images, and end-to-end hardware acceptance of a forged firmware image on a Wyze Video Doorbell v2 (T31X)."}, {"lang": "es", "value": "La ruta de verificaci\u00f3n de arranque flash de la ROM de arranque del SoC Ingenic T31 compara solo una palabra de 32 bits de la salida de la firma RSA contra una palabra de 32 bits del resumen de carga \u00fatil SHA-256, en lugar de comparar los datos completos. Esto permite a un atacante con acceso f\u00edsico de escritura a los medios de arranque falsificar im\u00e1genes SPL (Secondary Program Loader) modificadas que pasan la verificaci\u00f3n de arranque seguro sin posesi\u00f3n de la clave de firma del OEM. Cada intento de falsificaci\u00f3n tiene \u00e9xito con aproximadamente 2/3 de probabilidad. Esto ha sido validado mediante ingenier\u00eda inversa, emulaci\u00f3n de software contra im\u00e1genes firmadas por el proveedor y aceptaci\u00f3n de hardware de extremo a extremo de una imagen de firmware falsificada en un Wyze Video Doorbell v2 (T31X)."}], "id": "CVE-2026-50720", "lastModified": "2026-11-09T20:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "PHYSICAL", "availabilityImpact": "HIGH", "baseScore": 6.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.5, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50720", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-24T19:59:03.546301Z", "version": "2.0.3"}}]}, "published": "2026-08-19T14:17:32.130", "references": [{"source": "cve@mitre.org", "url": "https://opensensor.io/security/ingenic-t31-bootrom-partial-verification"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "ingenic_t31", "vendor": "opensensor"}], "created": "2026-08-19T19:00:05.218805+00:00", "title": "Ingenic T31 Boot ROM Secure-Boot Verification Flaw Allows Firmware Forgery", "updated": "2026-08-24T23:30:17.076232+00:00", "vendors": ["opensensor", "opensensor$PRODUCT$ingenic_t31"]}