CVE-2025-34256 is a critical hard-coded cryptographic key vulnerability affecting Advantech WISE-DeviceOn Server versions prior to 5.4. A static HS512 HMAC secret for JWTs allows remote unauthenticated attackers to forge tokens and impersonate any DeviceOn account, including the root super admin. This leads to full administrative control and potential remote code execution on managed agents, as reflected by its CVSS score of 9.8 (Critical). There is no known active exploitation, public exploit code, or KEV listing, though it has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.4CPE matchmatch criteria | cpe:2.3:a:advantech:wise-deviceon_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.