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CVE-2026-81572

7.8 · HIGH

In CodeMeter Runtime from version 8.40 to (excluding) 8.41a and 9.00 to (excluding) 9.10, cmu.exe --create-io --file C: creates a predictable temporary file under C:\CM-Stick.

Published Aug 27, 2026CWE-59EPSS 0.18%

Overview

CVE-2026-81572 is a high-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In CodeMeter Runtime from version 8.40 to (excluding) 8.41a and 9.00 to (excluding) 9.10, cmu.exe --create-io --file C: creates a predictable temporary file under C:\CM-Stick. The directory and

file paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before file

operations are performed. A local attacker can create a junction at the temporary file that points to an arbitrary

system path. Because CodeMeter Runtime runs with System privileges, this could allow arbitrary files to be deleted

with System privileges and potentially enable local privilege escalation.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103081.pdfRefshelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems-codemeter-application

How CyberStrike helps

Frequently asked questions

What is CVE-2026-81572?

CVE-2026-81572 is a high-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-81572?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-81572?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-81572?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-81572 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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