10.0Critical
CVE-2025-34256Advantech 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. Successful exploitation permits full administrative control of the DeviceOn instance and can be leveraged to execute code on managed agents through DeviceOn’s remote management features.
Weakness (CWE):
CWE-321
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| Advantech Co., Ltd. | WISE-DeviceOn Server | < 5.4.0 |
References and patches
- https://advcloudfiles.advantech.com/cms/2ca1b071-fd78-4d7f-8a2a-7b4537a95d19/Security%20Advisory%20PDF%20File… vendor-advisorypatch
- https://pellera.com/blog/advantech-wise-deviceon-cve-2025-34256-vulnerability/ technical-descriptionexploit
- https://docs.deviceon.advantech.com/docs/resource/ productProduct
- https://www.vulncheck.com/advisories/advantech-wise-deviceon-server-hardcoded-jwt-key-authentication-bypass third-party-advisoryThird Party Advisory
CPE matches (NVD) (1)
cpe:2.3:a:advantech:wise-deviceon_server:*:*:*:*:*:*:*:*< 5.4