Vulnerability · Published Jun 5, 2026 · Assigned by Altium
CVE-2026-11414Unauthenticated File Exfiltration in Altium Enterprise Server Vault Service via Hard-coded Cryptographic Key and Path Traversal
Critical 10.0
In plain English
A critical-severity hard-coded credentials in Altium Enterprise Server from Altium. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Official description
A hard-coded cryptographic key is used by Altium Enterprise Server to sign file download URLs in the Vault service. Because the key is identical across all installations, an unauthenticated network attacker who can reach the server can forge valid download signatures and retrieve files from the Vault storage area without any authentication, session, or credentials. A separate path traversal vulnerability in the same download endpoint allows the configured storage root to be escaped, enabling reads of arbitrary files on the server filesystem. Combined, these issues allow an unauthenticated attacker to obtain sensitive server configuration and key material, which can lead to full server compromise. The vulnerability can be chained with CVE-2026-9152 to enumerate and bulk-download stored content. Altium 365 cloud deployments are not impacted in practice, as file storage uses object storage rather than the local filesystem.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Altium | Altium Enterprise Server | 0 – before 8.1.1 |
Weakness: CWE-798, CWE-22 · Vector: 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