{"id":"CVE-2025-34256","state":"PUBLISHED","title":"Advantech WISE-DeviceOn Server < 5.4 Hard-coded JWT Key Authentication Bypass","description":"Advantech WISE-DeviceOn Server versions prior to 5.4 contain a hard-coded cryptographic key vulnerability. The product uses a static HS512 HMAC secret for signing EIRMMToken JWTs across all installations. The server accepts forged JWTs that need only contain a valid email claim, allowing a remote unauthenticated attacker to generate arbitrary tokens and impersonate any DeviceOn account, including the root super admin. 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