Local Privilege Escalation in CodeMeter Runtime on Windows

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81572
StatePUBLISHED
Assignerwibu
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-27 10:16:39 UTC
Updated2026-08-27 10:16:39 UTC
Descriptioncmu.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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 2fc02b1f-71e7-4514-a878-169626f68903

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

Problem Types: CWE-59 | CWE-59 CWE-59 Improper link resolution before file access ('link following')

VersionSourceTypeScoreSeverityVector
3.12fc02b1f-71e7-4514-a878-169626f68903Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wibu-systems-ag Codemeter-runtime affected 8.40 8.41a custom Windows
CNA Wibu-systems-ag Codemeter-runtime affected 9.00 9.10 custom Windows

References

ReferenceSourceLinkTags
shelltrail.com/research/local-privilege-escalation-to-system-in-wibu-systems... 2fc02b1f-71e7-4514-a878-169626f68903 shelltrail.com
cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/AdvisoryWIBU-103... 2fc02b1f-71e7-4514-a878-169626f68903 cdn.wibu.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andreas Vikerup of Shelltrail AB (en)

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