Which versions of Altium Enterprise Server are affected by EUVD-2026-34899?

Altium Enterprise Server on-premises installations prior to version 8.1.1 are vulnerable to unauthenticated remote file access, allowing attackers to read arbitrary server files including…. A patch is available.

How to fix or mitigate EUVD-2026-34899?

Within 24 hours: Identify and inventory all on-premises Altium Enterprise Server deployments and confirm installed versions. Within 7 days: Apply vendor patch to upgrade to Altium Enterprise Server 8.1.1 or later on all affected instances; confirm Altium 365 SaaS deployments are not affected. Within 30 days: Conduct security audit to detect unauthorized file access attempts in logs, review any exported configuration or key material, and validate patch deployment completeness.

Altium Enterprise Server EUVD-2026-34899

Q: What is the CVSS score of EUVD-2026-34899?

EUVD-2026-34899 has a CVSS 4.0 base score of 10.0 (Critical). CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

| CVE-2026-11414 CRITICAL

Use of Hard-coded Credentials (CWE-798)

2026-06-05 Altium

GHSA-q7h9-qxg9-hrm3

Authentication Bypass Path Traversal Hashicorp Altium Enterprise Server

10.0

CVSS 4.0 · Vendor: Altium

Severity by source

Vendor (Altium) PRIMARY

10.0 CRITICAL

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (Altium) · only source for this CVE.

CVSS VectorVendor: Altium

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jun 05, 2026 - 21:51 vuln.today

Patch available

Jun 05, 2026 - 21:01 EUVD

CVSS changed

Jun 05, 2026 - 20:22 NVD

10.0 (CRITICAL)

CVE Published

Jun 05, 2026 - 19:01 nvd

UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Unauthenticated file disclosure and arbitrary file read in Altium Enterprise Server prior to 8.1.1 allows any network-reachable attacker to forge signed Vault download URLs using a hard-coded key shipped identically across all installations. Chained with a co-located path traversal in the same download endpoint (and optionally CVE-2026-9152 for enumeration), an attacker can read arbitrary server-side files including configuration and key material, leading to full server compromise. No public exploit identified at time of analysis; CVSS 4.0 score is 10.0 and Altium 365 SaaS is not affected because cloud deployments use object storage rather than the local filesystem.

Technical ContextAI

Altium Enterprise Server is the self-hosted version of Altium's PLM/PDM platform for electronic design data, including the Vault service used to store engineering files. The root cause is CWE-798 (Use of Hard-Coded Cryptographic Key): the Vault download endpoint signs URLs with a static key embedded in the product binary, identical across every customer install, so signatures are universally forgeable rather than tenant- or instance-specific. A second flaw in the same handler fails to canonicalize the requested storage path before resolving it against the configured storage root, permitting traditional path traversal (../ sequences) to escape into arbitrary filesystem locations readable by the service account. The vendor tag 'Hashicorp' in the intelligence feed suggests the leaked filesystem contents typically include HashiCorp-format secrets or Vault-related configuration that yields further privilege escalation paths on the host.

RemediationAI

Upgrade Altium Enterprise Server to version 8.1.1 or later, which is the vendor-released patch and the only complete remediation since the hard-coded key cannot be changed by the operator without a code-level rotation. Until the upgrade window, restrict network reachability to the Vault download endpoint at the perimeter so that only trusted engineering networks or VPN clients can issue download requests - this blocks the signature-forgery path but also blocks legitimate remote designers, so plan for user impact. As a stop-gap layered control, place a reverse proxy or WAF in front of the server to drop requests whose path component contains traversal sequences (../, encoded variants %2e%2e, double-encoded ..%252f) and log download endpoint hits for offline review; this does not stop signature forgery for in-scope files but does shut down the arbitrary-file-read leg used to harvest key material. After patching, rotate any credentials, API tokens, or HashiCorp/Vault secrets that resided on the filesystem of an exposed server, since you must assume those have been read. The vendor advisory index is at https://www.altium.com/platform/security-compliance/security-advisories.