CVE-2026-11423

Path Traversal in Altium Enterprise Server Collaboration Service Allows Privilege Escalation

Published Jun 5, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Altium
Altium enterprise Server
Vendors & Products Altium
Altium enterprise Server
Type Values Removed Values Added
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.
Title Path Traversal in Altium Enterprise Server Collaboration Service Allows Privilege Escalation
Weaknesses CWE-22
CWE-269
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Altium
Published
Updated
Jun 8, 2026, 1:10 PM
Reserved
Jun 5, 2026, 8:07 PM
Status
Awaiting Analysis
Published
Jun 5, 2026, 9:16 PM
Modified
Jul 23, 2026, 7:10 AM