Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-1
- https://shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-sys
FAQ
What is CVE-2026-81572?
CVE-2026-81572 is a vulnerability with a CVSS score of 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. The directory and file p...
How severe is CVE-2026-81572?
CVE-2026-81572 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-81572?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.