Advantech WISE-DeviceOn Server up to 5.3 Installation hard-coded key

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Advantech WISE-DeviceOn Server up to 5.3 and classified as critical. This affects an unknown part of the component Installation Handler. Executing a manipulation can lead to hard-coded key. The identification of this vulnerability is CVE-2025-34256. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Advantech WISE-DeviceOn Server up to 5.3 and classified as very critical. This vulnerability affects an unknown code of the component Installation Handler. The manipulation with an unknown input leads to a hard-coded key vulnerability. The CWE definition for the vulnerability is CWE-321. The use of a hard-coded cryptographic key significantly increases the possibility that encrypted data may be recovered. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by Alex Williams. The advisory is available at advcloudfiles.advantech.com. This vulnerability was named CVE-2025-34256 since 04/15/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/12/2025). This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

Upgrading to version 5.4 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Hard-coded key
CWE: CWE-321 / CWE-320
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: WISE-DeviceOn Server 5.4

Timelineinfo

04/15/2025 CVE reserved
12/06/2025 +235 days Advisory disclosed
12/06/2025 +0 days VulDB entry created
12/12/2025 +6 days VulDB entry last update

Sourcesinfo

Vendor: advantech.com

Advisory: advcloudfiles.advantech.com
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2025-34256 (🔒)
GCVE (CVE): GCVE-0-2025-34256
GCVE (VulDB): GCVE-100-334534

Entryinfo

Created: 12/06/2025 04:55
Updated: 12/12/2025 06:12
Changes: 12/06/2025 04:55 (68), 12/12/2025 06:12 (10)
Complete: 🔍
Cache ID: 216::103

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