Vulnerability Description
Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file uploads where a user-supplied filename component is used to construct the destination path without validation, allowing arbitrary files to be written to any location writable by the service account. Because the file write operation completes before authentication is validated, the vulnerability can be exploited without any credentials, session, or prior knowledge of the system. An unauthenticated network attacker can use this primitive to place executable content in directories where it is later executed by the service, resulting in remote code execution under the Vault Service account. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 (commercial and government cloud) at the service level.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-11429?
CVE-2026-11429 is a documented vulnerability. Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file uploads where a user-supplied filename component is used to construct the destinati...
How severe is CVE-2026-11429?
CVSS scoring is not yet available for CVE-2026-11429. Check NVD for updates.
Is there a patch for CVE-2026-11429?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.