Two path traversal vulnerabilities in the Network Installation Service (NIS) of Altium Enterprise Server allow an unauthenticated network attacker to write arbitrary files to any writable location on the server filesystem and to read package archive files from the server. No authentication, session, or credentials are required.
Because content-controlled files can be written to web-accessible directories, or used to overwrite application binaries or configuration files, exploitation can be escalated to remote code execution in the context of the service account, and can disclose deployment package contents. Altium 365 cloud deployments are not affected, as the Network Installation Service is not part of the cloud offering.
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History
Fri, 05 Jun 2026 21:30:00 +0000
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Fri, 05 Jun 2026 20:15:00 +0000
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| Description | Two path traversal vulnerabilities in the Network Installation Service (NIS) of Altium Enterprise Server allow an unauthenticated network attacker to write arbitrary files to any writable location on the server filesystem and to read package archive files from the server. No authentication, session, or credentials are required. Because content-controlled files can be written to web-accessible directories, or used to overwrite application binaries or configuration files, exploitation can be escalated to remote code execution in the context of the service account, and can disclose deployment package contents. Altium 365 cloud deployments are not affected, as the Network Installation Service is not part of the cloud offering. | |
| Title | Path Traversal in Altium Enterprise Server NIS Allows Unauthenticated Arbitrary File Write and File Read | |
| Weaknesses | CWE-22 CWE-306 |
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cvssV4_0
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Status: PUBLISHED
Assigner: Altium
Published:
Updated: 2026-06-05T20:29:45.593Z
Reserved: 2026-06-05T19:57:41.002Z
Link: CVE-2026-11420
Updated: 2026-06-05T20:29:42.446Z
Status : Awaiting Analysis
Published: 2026-06-05T20:17:29.350
Modified: 2026-06-05T20:49:52.790
Link: CVE-2026-11420
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OpenCVE Enrichment
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