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Description

A path traversal vulnerability exists in the Altium Enterprise Server Collaboration Service due to improper handling of user-supplied filenames in the MCAD and Simulation file download flows. A regular authenticated user can submit a collaboration message containing a crafted filename, which is later used to construct the download path on the server without validation, allowing arbitrary files to be read from the server filesystem. Because the readable files include the server's master configuration, which stores credentials for privileged accounts, exploitation can lead to authenticating as a system administrator and gaining full control of the server. Altium 365 cloud deployments are not affected.

PUBLISHED Reserved 2026-06-05 | Published 2026-06-05 | Updated 2026-06-08 | Assigner Altium




CRITICAL: 9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Problem types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-269 Improper Privilege Management

Product status

Default status
unaffected

Any version before 8.1.1
affected

Credits

Joris Aerts, Tesla Inc. finder

References

www.altium.com/...rm/security-compliance/security-advisories

cve.org (CVE-2026-11423)

nvd.nist.gov (CVE-2026-11423)

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