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Improper Access ControlWeakness · CWE-284

CVE-2026-36035

MEDIUM · 6.5 CVSS v3.1 Published 2026-07-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
71/100
Remediation priority · Elevated
Remotely reachable Zero-click 5 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Incorrect access control in the /api/License/deactivateOffline endpoint of CAXPerts UniversalPlantViewer WebServices Server v2.7.6 allows authenticated attackers with low-level privileges to cause a Denial of Service (DoS) via removing the license from the webserver.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

CAXPerts UniversalPlantViewer WebServices Server v2.7.6 contains an incorrect access control vulnerability in the /api/License/deactivateOffline endpoint. Authenticated attackers with low-level privileges can exploit this to remove the license from the webserver, causing a Denial of Service.

MitigationImplement proper role-based access control (RBAC) on the /api/License/deactivateOffline endpoint to ensure only users with administrative privileges can deactivate licenses, and validate user permissions before executing license operations.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify installed version of UniversalPlantViewer WebServices Server
    Locate the software installation directory and check version information in the application metadata, About dialog, or version file (consult product documentation for version file location). Compare the found version to v2.7.6.
    Affected if The installed version is 2.7.6 or falls within the affected range around this version.
  2. Confirm the WebServices Server is running
    Access the WebServices Server endpoint base URL (typically http://hostname:port/upsws/ or similar path) in a web browser or check if the service is listening on configured ports.
    Affected if The server is accessible and running, exposing the WebServices API.
  3. Verify the vulnerable endpoint exists
    Attempt to access the /api/License/deactivateOffline path on the running server (for example: http://hostname:port/upsws/api/License/deactivateOffline). Check if the endpoint responds.
    Affected if The /api/License/deactivateOffline endpoint is present and responds to requests.
  4. Review user role configuration
    Examine the user accounts and their assigned roles within the UniversalPlantViewer administration interface or user configuration files. Identify whether low-privileged or non-administrative users exist in the system.
    Affected if There are authenticated users with low-level or non-administrative privileges present in the system.
  5. Check endpoint access control configuration
    Review the access control settings for the /api/License/deactivateOffline endpoint in the WebServices Server configuration, security settings, or API permission tables.
    Affected if The endpoint allows access by users without administrative privileges, or no explicit role restriction is configured for this endpoint.

A user is affected if the installed UniversalPlantViewer WebServices Server version matches 2.7.6 or the affected range, the server is running with the /api/License/deactivateOffline endpoint exposed, and low-privileged users can access this endpoint without proper administrative role enforcement.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement proper role-based access control (RBAC) on the /api/License/deactivateOffline endpoint to ensure only users with administrative privileges can deactivate licenses, and validate user permissions before executing license operations.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-36035 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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