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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "BUFFALO Wi-Fi router products", "source": "cna", "vendor": "BUFFALO INC."}, "product": "wi-fi_router_products", "vendor": "buffalo"}], "analysis": {"en": {"generated_at": "2026-04-01T03:51:20.432114+00:00", "value": {"mitigation_remediation": ["Apply the latest firmware update that includes the authentication bypass fix.", "Disable or tightly restrict remote web\u2011management access on the router.", "Configure strong, unique administrative passwords in place of defaults.", "If available, enable HTTPS for the router administration interface to limit exposure to unencrypted traffic.", "Regularly review configuration logs for unexpected changes and audit the device\u2019s operational state."], "summary": {"action": "Patch firmware", "impact": "Unauthorized configuration changes without authentication"}, "threat_synthesis": {"affected_systems": "The vulnerability affects a broad set of Buffalo Inc. Wi\u2011Fi router products. Models include FS\u2011M1266, FS\u2011S1266, VR\u2011U300W, VR\u2011U500X, WAPM\u20111266, WAPM\u20111266WDPR, WAPM\u20112133, WAPM\u2011AX4, WAPM\u2011AX8, WAPM\u2011AXEtr, WAPS\u20111266, WAPS\u2011AX4, WCR\u20111166DHPL, WEM\u20111266, WRM\u2011D2133, WSR\u20113600, WTR\u2011M2133, WXR\u20111750, WXR\u20111900, WXRT\u20116000, WXRT\u201118000, WZR\u20111166, WZR\u20111750, WZR\u2011600, WZR\u2011900 and several related variants as enumerated in the supplied CPE list.", "description_and_impact": "An authentication bypass flaw in the web\u2011based administration interface of Buffalo Wi\u2011Fi routers allows an attacker to make configuration changes without any credentials. The flaw is a failure in verifying authentication before accepting configuration commands, enabling manipulation of network settings, opening services, or redirecting traffic. The weakness is classified as CWE\u2011288, imposing a high risk to confidentiality, integrity, and availability of the network served by the device.", "risk_and_exploitability": "The CVSS base score of 8.7 indicates a high severity vulnerability. EPSS shows exploitation probability is currently below 1\u202f%, and the flaw is not listed in CISA\u2019s KEV catalog. Inferred attack vector is the router\u2019s remote management interface, requiring only access to the device\u2019s IP or hostname; the attacker does not need authentication, making exploitation straightforward once the device is reachable. Although the threat score is high, actual exploitation depends on network exposure of the router."}}}}, "created": "2026-03-27T09:22:13.400070+00:00", "updated": "2026-04-02T07:55:43.379753+00:00", "vendors": ["buffalo", "buffalo$PRODUCT$wi-fi_router_products"]}